I was told on here to return the t8 10.0 and get the t5 5.0 If I side the tank (40 gallom) so bought black light fixture someone on here recommeded and the bulb is huge and you guessed it, wrong size as 24" is fixture size So it needs a 22" bulb. So i ordered a 22" teptisun t5 5.0 and now i can...