stretching

ive had the torch for about 3 weeks now and from the first day i took it home it had 1 or 2 tentacle that were longer than the other , and i didnt think anything of it, now its getting worse and i tested all my water parameters and everything is fine, except my nitrites they were a little high...

I have a colony of neon orange zoas/ on square tile...maybe 100 or so heads with green skirts.They came on a square tile..edge to edge packed TIGHT. Had them in a 29 gallon biocube with stock PC lighting for 2-3 months...did fine ...then upgraded to 90 gallon 6x54t5. Been in there healthy and...