water clarity problems
My 55gl tank has been up and running for 4 months now and in the last 3 weeks the water has a green bloom in the middle to were I cannot see clearly from one side of the tank too the other. I do 30% water changes weekly and all my water parameters are good. I have my lighting on a 12hr cycle and feed 2 times a day (flakes,pleco wafers). With only 15 tetras,20ish cherry shrimp and a 4" pleco I know that my fish load is low so what else could it be. The tank is heavily planted and has some Porous rock and drift wood with sugar grain sand for substrate. 2 hob's with just screen media and NO carbon. The plants are fed a liquid fert every other week which could be the issue or I have read of invert lighting being a possibility and since it has been nice out all the windows in the house have been open so may be that is it. I don't really want to add another chemical to fix the issue but it is tempting.
I am sure that Byron or one of the other members will answer also. But you have an algae bloom. I would try reducing the amount of light that the tank is getting each day, and see if that helps. Others should be able to give more input :-D
Green water (as opposed to a white cloudiness) is due to unicellular algae. It occurs when light is too intense, plus excess nutrients.
I agree with what's been suggested; reduce your light duration, and reduce feeding. The more food going in to the tank, the more organics will be produced.
Chemicals willnot resolve this. They can mask the problem, but the underlying causes are still there unless they are corrected. Plus even worse is the effect many of the chemicals have on fish.
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