HI this is a daft question but how often should you vacuum bottom of the tank, I have been doing it every two weeks and it is always very dirty is it poo or food that has not been eaten??.
Thanks in advance.
Thanks all for advice.
I also had my tank at the back of the room but we could not enjoy it so we moved it into the middle of the wall now I am getting green gunk on the glass. Before you reply it is not getting direct sunlight onto it but is this the problem??
Excess nutrients and light are big contributors to algae. To knock out the algae growth, black the tank out for 3 days. By black out, I mean cover it so absolutely no light gets in, and do not feed the tank. Don't worry about the fish...3 days with no food is not going to hurt them. After the 3 day period, do a 50% water change and clean the decor. That should stop your current outbreak. To prevent it from coming back, look very closely at how much food you are giving, and how long the tank lights are on. If at feeding time there is food making it to the bottom of the tank before the fish eat it, you are over feeding and need to reduce what you give them. Plan roughly 2 flakes of food per fish. As for lighting, do not leave it on more than 6 hours per day. Even at 6 hours per day, if the ambient light in the room is bright, you could still have problems, which would make controlling the food even more important. If you have room in the tank, a pair of otos would also be a really good idea. They'll have the algae for breakfast! Literally!
Thanks guys good advice. I put the light on for about four hours, My tank is 97lt I only keep 20 small fish all mixed tetra's and two catfish peppered. The light is left on for about four hours 75% water change every week every second week bottom vacuumed and all orniments cleaned.
As for feeding I put in about 10 flakes crushed up and two small sinking feeders for cat fish.
Also what are otos and will they be ok with other fish??
soon as I deside to get my 10 gal tank from gfs house and fill it with some water ill sit that out side and get it growing some algae and hope that the plecos don't get it and let some of the algae seed the rest of my 75 gal tank up!!!