Algae and Pond Weed Control
String algae and planktononic algae are the two primarily types of algae that
effect Koi ponds and water gardens.  One is string like and typically grows
on most anything in your pond.  Planktonic algae are what turn the water a
lovely shade of green.  The following information is based on what we do to
eliminate and prevent algae.

What Causes Algae ?

I like to keep this simple

Sunlight + nutrition (Phosphates and NitrAtes) + not enough plants +
poor water movement = GREEN STUFF.

Sunlight obviously comes from the sun and the nutrition is a result of fish
waste, dead and decaying leaves/ plants, and decomposed fish food.  

Eliminating and Preventing Algae

  1. Starve the algae with water changes.  Water changes reduces
    NitrAtes and no matter what method of algae control you choose,
    water changes are a good starting point.  Unfortunately, water
    changes will only solve the problem for a day or two..
  2. Providing live plants to compete for nutrients.  Plants like Water
    Hyacinth, Water Lillies, Parrot’s feather and Frogs Breath spread
    along the surface f the water, using NitrAtes, starving algae and deny
    the algae much needed light from the sun.  Other methods of reducing
    sunlight exposure include the use of pond dyes.  You can find our
    plants here.
  3. Beneficial Bacteria. “Beneficial” bacteria are a type of bacteria that
    is required to not only break down toxic ammonia from fish wastes
    into harmless nitrates (referred to as the Nitrogen Cycle) but they also
    consume the same nutrients as algae does.  Adding beneficial
    bacteria starves the algae. Beneficial bacteria also breaks down
    sludge build up, on the bottom of ponds and much more.  It is
    absolutely vital to any healthy pond.  Establish beneficial bacteria in
    your pond requires it a place to grow such as a biological filter, rocks,
    plants, and filter media.  Beneficial bacteria “colonize” and typically
    take 3-8 weeks to establish naturally.  The colonization process can
    be jump started with the EZ-2, NITRIFIER, or MICROLIFT.
  4. Move the water.  It is recommended that you turn the water in your
    pond one to two times per hour.  What that means is if you have a
    1000 gallon pond, you should have at least a 1000 – 2000 gallon per
    hour pump, with appropriate filtration.  Even if you have good water
    movement, you can still have ‘dead’ water movement zones.  A pond
    that is two feet or deeper can have little to no movement in the deeper
    zones.  Even of you turn your pond water properly; you should use an
    aeration device in the deepest zones to move the ‘dead’ water to the
    top where it can get properly turned with the rest of the pond water.  
    We have a large assortment of aeration systems for very small tanks
    or ponds to ponds and lakes many acres in size.  You can find our
    aerators here.
The following chart will guide you to the solutions I recommend
for resolving both types of algae problems
Algae Type
Plantonic/ Green Water
EZ-2, Water Clarifier,
D-Solve, Clarity Max

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