Alex,
I have three Sclero colonies in a 40 breeder. In addition to the return, I have an MP40 at half speed, so water is moving very briskly. One is 4 months old, the other only two months old. They are all looking good. I was target feeding several times a day, but tried broadcast feeding several times in the past week. They seem to inflate more and look better with broadcast feeding, so I'm going to do more of that than target feeding. Don's experience with Sclero makes me a bit nervous.
Gary