Originally Posted by Boredomb
Ami 1077 agrees that it kinda looks like diatoms which is the +one. Oto catfish are best kept in groups though.
Ami is this a new tank? Diatoms are common in new setups and can disappear as quickly as they showed up or sometime will be around for a couple weeks. If it is not a new setup have you done anything to the aquascape? How old are the lights? Just some things to point others in the right direction to figure out how to help you
The 20 gallon has been running since May 2011. The tank was fine until I treated my fish for Ich using" Ick Attack" in the last week of July. Things have gone crazy since then.
I used to have 4 otos, but three died. Will be replacing them soon. The light is 4 months old. Its a 15W T8 GE full spectrum tube that I use in my 55 as well. The water used to crystal clear before I used the medication. I'm attaching a pic of the water I took out during my last water change. (I use a 5 gallon pail).
My current lightin period is 10 hours. That works fine with my 55 gallon which has been running since mid July(after cycling for a month). However, I am wondering if cutting down the light to 8 hours will help.
I guess the only change in the aquascape has been the replacement of plastic plants with real ones (Aponogetons, java fern var Windelov and Anubias barteri var nana). I also added a sponge filter in the last week of July. I cleaned it for the first time today...perhaps this is the culprit?