ALGAE CONTROL WORKS
When EC-504 is applied to the water phase, algae blooms
are controlled through competition. EC-504 remove nitrogen
compounds from the water column faster than the algae and,
as a result, the algae are starved out of existence or bloom
is inhibited. In addition, EC-504 degrades accumulated
organic waste, top scum and bottom sludge for use as carbon
sources. The overall result is clean, clear water, free from
algae, odors and sludge. EC-504 is designed to treat the
cause, not the effect.
- ALGAE GROWTH AND CONTROL
What stimulates algae growth?
filamentous algae grows on the bottom of shallow ponds and
on rocks and aquatic plants. Sometimes, filamentous algae
floats to the surface forming large mats. There are numerous
species of filamentous algae and, in some ponds, several
species can be present at the same time.
Factors that directly affect algal growth include Low oxygen
levels in the water column, available forms of nitrogen and
phosphorus, sunlight, and temperature.
level of phosphorus does it take to stimulate algae growth?
Depending on geographical location, environmental
conditions, water column characteristics, etc., surface
water concentrations ranging from 4 - 20 ug/L can trigger an
algae affect DO (dissolved oxygen) levels in the water
Periodic Oxygen depletion, resulting from algae respiration
and decomposition, can occur during algae blooms.
During the day algae take up carbon dioxide and release
oxygen into the water column through
photosynthesis. This can cause DO levels to increase. During
the night, algae take up oxygen and release carbon dioxide
into the water column.This
can cause DO levels to decrease. Algae, suspended below the
surface, cannot photosynthesize and, as a result, they
decompose. The decomposition process consumes dissolved
oxygen, and, as a result, DO levels in the water column can
EC-504 harm turf?
No, EC-504 also improves the water quality of irrigation
ponds by breaking down ammonia salts and other contaminants
before they reach the turf. EC-504 enhance turf health. The
microbes used in EC-504 are natural soil and water bacteria
that are an essential part of the mechanism for the
efficient transport of nutrients from the soil into the turf
Is EC-504 Algae control safe for fish?
Yes. By removing ammonia and
nitrite from the water, EC-504 enhances the aquatic
environment for fish and other wildlife.
What is thermal Stratification?
Typically, when pond water is warm and in full sun, oxygen
is consumed faster than is replenished. This can result in
thermal stratification in the water column. That is to say,
the warmer, oxygen rich upper layers of water are suspended
on top of the cooler oxygen deficient lower layers. When
this occurs, conditions within the pond environment change.
Beneficial aerobic bacteria become inactive and anaerobic
bacteria take over.
The rate, at which the biodegradable component(s) in the
bottom sludge layer is degraded, is significantly reduced.
Sludge accumulation increases.
Nutrient levels, in the bottom sludge layer begin to climb
resulting in algae bloom, excessive scum accumulations and
plant growth and higher ammonia and hydrogen sulfide levels.
Biological oxygen demand increases and dissolved oxygen
Will EC-504 Algae Control work within the pond bottom and sludge layer?
Yes. EC-504 provides the correct
biomass for the entire pond, including the sludge layer. The
sludge layer can be the largest contributor of nutrients to
the pond for two reasons. (1) As organic matter, i.e.
leaves, grass clippings, fecal matter from fish, frogs,
birds, etc., degrades on the pond bottom, it releases
nitrogen and phosphorus (2) The bacterial populations in the
sludge layer can be damaged by herbicides, algaecides and
pesticides flushed into the pond during rainstorms. EC-504
will repopulate the sludge layer and degrade nitrogen and
phosphorous. This not only reduces the sludge layer volume
but also reduces the nutrients that algae need as an energy
How does EC-504 control odor?
The microbes in EC-504 attack the
cause of the pond odour, ammonia and slow decaying organic
matter. By accelerating and stabilizing the natural nitrogen
conversion reactions, EC-504 greatly reduces or eliminates
the release of ambient ammonia. Rapid digestion of
accumulated organic matter eliminates foul odour.
How does EC-504 clarify water?
EC-504 reduces the algae
population and digests floating and suspended organic matter
that clouds the water column.
EC-504 clear a pond of existing algae?
Yes, however, EC-504’s mode of
action is to “starve” the algae by out-competing for a
primary nutrient, nitrogen. Therefore, it is most
effective when used as a preventive maintenance program,
before algae commence blooming.
Is EC-504 compatible with algaecides or pesticides?
No, algaecides kill biomass and,
as a result, fewer nutrients are digested and the potential
for long-term algae problems increases. It is important to
note that the copper used in algaecides and herbicides
accumulates in bottom sludge causing an ever-increasing
toxicity problem for natural microbes.
Is EC-504 an algaecide?
No, EC-504 is not an algaecide.
EC-504 is designed to digest the algae’s primary growth
nutrient, nitrogen. It will not kill living biomass. EC-504
will help to re-establish a healthy, balanced aquatic
ecosystem. EC-504 is non-toxic, non-corrosive, and all
natural and will not harm animals, plants, birds, fish or
What about aeration?
EC-504 bacteria utilize dissolved oxygen in their digestive
processes. Typically, this does not affect the dissolved
oxygen concentration in a well-aerated pond. Aeration will
reduce or prevent thermal stratification and enhance the
effectiveness of EC-504, as well as benefit all aquatic life
present in the pond. It is recommended that all ponds, with
inadequate dissolved oxygen levels, be aerated.
Are permits or applicator’s licenses necessary?
Typically, no. EC-504 is not regulated and a permit or
applicator’s license is not required.
How is EC-504 used?
EC-504 is a pond
management program, not a one time, quick-fix chemical
addition. As such, it requires initial preparation and
continued attention in order to provide optimum results. An
initial heavy dose is required to rapidly populate the pond
with the necessary cultures. Seasonal golf courses require
only one initiation dose, while year round courses should be
done twice. The initial dose is applied at a rate of 3
lb./acre-foot of water.
What is the purpose of the maintenance dose?
EC-504 is a
preventative maintenance product. Accordingly, an
application every two to three weeks will ensure that
biomass levels remain sufficient to handle nutrient inflows.
Water outflow, irrigation, leaching and inter-species
competition, with less desirable microbes, can reduce
biomass. Typically, each treatment environment has a unique
set of characteristics that impact microbial activity and,
as a result, the time window to achieve the desire results
will vary from pond to pond.
APPLICATION RATES FOR POND VOLUMES GREATER THAN 326,000 GAL.
TYPICAL APPLICATION RATE (MAINTENANCE):
1 lb. / Acre Foot.
TYPICAL APPLICATION INTERVAL: Every 3 to 4 weeks for
the duration of the algae season.
acre-foot = 326,000 Gallons.
How to calculate
A triple dose (three times the maintenance dose) is
recommended for the first treatment and a double dose for
the second treatment. Thereafter, use the maintenance dose
as determined in step 3, below. For ponds that already have
some algae growth or that receive heavier nutrient loads
(from lawn fertilizers, farm fields, geese manure, etc.),
use a double dose until the algae is eliminated then revert
to maintenance dose. For small ponds and water gardens, see
Estimate the surface area of the pond in
acres. (One acre is about 210 feet square or exactly 43,560
average pond depth in feet. (Estimate a bit high if unsure)
Multiply the surface area in acres x the
average depth in feet. The result is the pond volume in
acre feet as well as the number of pounds of bacteria
required for maintenance.
(Example: 0.5 Ac. X 4’ deep = 2.0 Acre-feet (2
Estimate the total number of weeks in the
algae growing season or the number of weeks the pond water
temperature will be above 500F. (Note that algae
begin growing in waters at or above this temperature and
cease vigorous growth below this temperature).
Divide the number of weeks in the growing
season by 3 and add 1 to the result. This will give you the
number of seasonal treatments.
(Example: 28 weeks divided by 3 = 9.3 - Add 1 for a total of
11 seasonal treatments)
Add 3 to the number of seasonal treatments to
account for the two initial heavier doses.
(Example: 11 + 3 = 14)
the number obtained in step 6 x the maintenance dose (step
3). This will give you the total number of pounds of
bacteria you will need for the algae season.
(Example: 14 x
2.0 = 28 pounds/season)
For optimum performance water pH should be between 6.0 and
8.0. Check pH before beginning seasonal treatments and
several times during the season. Adjust pH to within those
limits if necessary. A pH of 7.0 is most desirable.
RATES FOR CONTROLLING ALGAE IN SMALL PONDS AND WATER GARDENS
The following table is intended as a general guideline for
treating small ponds and water gardens for algae, scum and
bottom sludge control. The recommended amount depends on the
historic amounts of algae and scum grown on the pond when
untreated and the number of fish in the pond. Typically,
manure and urine resulting from waterfowl can significantly
increase loads and suggested dosing amounts should be
doubled or tripled depending on the number of birds.
light accumulation of algae or scum is one that covers
approximately 5 – 10% of the pond surface; a medium
accumulation about 10 - 20%; a heavy accumulation about 20 –
40% and a very heavy accumulation over 40%. A light to
medium accumulation will usually require a dose at or near
the lower limit in each category, while a heavy or very
heavy accumulation will require the maximum dosage in each
EC-504 shown below are the maintenance dosages. The first
dose should be 3 times this amount; the second dose 2 times
this amount. If the pond is not clear and algae free after
the second dose, continue to apply the second dose amount
until it is. Then use the maintenance dose to keep the pond
in that condition. Ponds in areas that do not have a winter
algae kill, i.e. those whose water temperature does not go
be low 500F at any time of the year, should
restart the dosing procedure with the 3x, 2x and maintenance
dose procedure every 6 months. Ponds that are seasonal
require the above sequence of doses at the beginning of each
RATES FOR PONDS UP TO 326,000 GAL.
POND VOLUME (Gal.)
APPLICATION RATE (oz.)
Less Than 10,000
0.5 - 1.0
1.0 - 2.0
20,000 - 40,000
2.0 - 4.0
40,000 - 75,000
4.0 - 8.0
75,000 - 150,000
8.0 - 16.0
150,000 - 326,000
16.0 - 20.0
FOR PONDS GREATER THAN 326,000 GALLONS, USE ABOVE
APPLICATION DATA TO CALCULATE RATES
Typically, when chemical fertilizer
is applied to areas around a pond, a surge of nitrates into
the pond can be expected. This can result in new algae
growth in shallow areas. When this occurs, temporarily
increase the maintenance dose for one or two applications to
account for this nutrient surge. Use the 2x or 3x amounts
depending on the degree of new growth. To apply, simple toss
the water soluble pouches directly into the
Acre = 43,560 sq. feet
Gallon = 8.345 pounds
1Acre = 4,407 sq. meters
1 Metric Ton – 1,000 Kilograms = 2,205 pounds = 0.0067673
1 Pound = 453.6 Grams
Acre-Foot = 43,560 cu. ft. = 325,829 gallons
Cubic Meter = 264.2 gallons
1 Meter = 3.281 feet
The materials used in the production of EC-504 Algae Control are derived
from naturally occurring and sustainable sources. EC-504 is
environmentally friendly, biodegradable and is not
harmful to animals, plants and humans.
STORAGE & HANDLING
Store in a cool place away from direct sunlight. No
special handling required.
Fully complies with EPA Toxic Substance
Control Act (TSCA) and the rules, orders and regulations
promulgated there under including:
a) Sections 4, 5, 6 & 7; Title 40 Chapter 1, 707.20 thru
b) 40 CFR Sections 704.3. 710.2(e) and 720.3(c); and
c) Sections 5 and 13, reference 42FR64583
d) Does not contain marine
pollutants as defined in 49 CFR 171.8.
Natural Pond Cleaner - Algae Eliminator
MORE SATISFIED EC-504 CUSTOMERS
----- Original Message -----
Sent: Monday, March 23, 2009 5:04 AM
Subject: EC 504 order // Donald
The following is my EC 504
testimonial. If you would like to use it on your site, I would
EC 504 is the greatest! I live in
south Louisiana, and have had a pond of about 2700 gallons for
nine years. Our weather is very much tropical, and our summers
are very hot, and wet. I have had a significant algae issues in
my pond almost from the start, and have tried numerous algae
remedies. EC 504 is by far the best product I have used! To make
the deal even sweeter EC 504 is also the most economical product
I have tried!..................
Better................Cheaper..................I LOVE EC 504.
New Orleans, Louisiana
document is on file at EcoChem)
----- Original Message -----
Sent: Thursday, March 20, 2008 1:58 PM
Last year we treated 2 one acre ponds
with your EC 504 and it worked so well that this year we will be
treating all four of our one acre ponds. My question is we
have horses that drink out of one of these ponds. Is there any
toxicity factor that we would need to be concerned about.
document is on file at EcoChem)
----- Original Message -----
Sent: Tuesday, August 02, 2005 3:05 PM
Subject: Re: Question re: EC-504
wife and I have been water gardening for over 15 years and our small
pond is heavily stocked with mature Koi fish. We have used many
algae control products over the years and find EC 504 is the best
product by far, our pond has never looked better. It keeps string
algae under control, and algae build up on the river rock lining is
John & Paula
document is on file at EcoChem)
Original Message -----