I have a 20G tank, with 13 fish (6 Tiger Barbs, 6 Serpae tetra and 1 ringed loach). Currently it is fairly heavily planted and I have a problem with thread algae, what looks like red algae and a little GSA.
The tank is about 18 Months old, all the fish are adult. My nitrate levels are usually about 20ppm. I think that the problem is that the nitrates are too high, they always used to be about 10ppm. Unfortunately my Tap water is at about 10ppm already so the water changes are having little effect at getting rid of the nitrate.
I do not use CO2 (I was using Excel but all the local stores have sold out currently). The issues was there before I ran out of Excel.
the ferts I add are occasional trace, occasional iron and occasional pottasium (because I had a deficiency a while ago)
Lighting is a 36W AH Supply DIY job. (about a year old, would the bulb need replacing?)
Any idea what I can do to help get rid of this algae, do I perhaps need to add another fert such as phospate; is there a cheap and easy way to clean it out of the tap water; can I add something to the filter? Would adding an SAE make the fish load too high (I kind of think it is already)?
Last edited by crisps; 12-03-2007 at 09:35 PM.
Reason: more info