So sand is no good then.
I replaced one of the bulbs because it went but they both come on really bright and then really dim down.
I was thinking that with the 205, it just doesn't seem to be good enough for a tank of that size.
I have a couple of questions the first is what is the best substrate for community tank with plecos, I was think sand or natural stones?
Second question is when I turn up my tank light (Fluval Vicenza 180) the lights come on nice and bright then about 30 mins later they dim right down, should I...