hi back to the same topic am afraid done all the water changes,done the 3 days complete darkness, still no joy with getting rid of the green water!
we have a 200 litre tank with a fluval 205 pump.in the tank we have 2 parrot fish,3 silver sharks,2 red spotted severums a cherry barb and a plec.
everytime we do a water change within 2 days the water is green again! we are actually thinking of doing a full water change as this has gone on for so long now and nothing else is working
Green aquarium water is caused by free-floating single celled green algae.With the correct conditions single cell green algae is very prolific. So prolific that there are literally billions and billions of the green algae free-floating in your aquarium water, enough to cause your water to turn green. If you have no sunlight entering the room where your aquarium is located the aquarium light bulb might be the cause and you may be having your lights on for too long a period so try cutting that down.
Other causes are -
Excess nutrients - Nutrients such as phosphates and nitrates also support the algae growth, and must also be reduced to successfully battle algae. A water change will give some immediate relief, but probably won't resolve the problem completely. It's important to deal with phosphates and nitrates at their source to rid yourself of them.
Phosphates - Phosphates come from two sources - decaying matter such as fish food, and from the water source itself. Testing your tap water for phosphates will let you know if you have a problem with your water source. If your water naturally has a high level of phosphate, you will need to use RO water, or a phosphate remover to treat the water. Reducing the amount of food you give your fish, and changing to a brand that is lower in them.
Nitrates - Nitrates naturally rise in the aquarium over time, as a byproduct of fish wastes. The only way to remove them is to perform a water change. Make sure your filter is kept clean, and is adequate for your tank size. Also, make sure you have not overstocked your aquarium, or you will constantly battle rising nitrate levels.
if all else fails you can buy chemicals to clear it although personally I dont know how effective these are, or buy a UV sterilizer which will cure it.
