mustangcaleb
Member
i have a 4 bulb 36" TEK t5 setup over my 25g. i got the light used and was told the fixture was 8 months old and ive now had it for about... 3 or 4 months. So ive been thinking that may be the cause of this little bit of brown algae i cant seem to get rid of. how often do t5's need to be changed? my lights stay on about 8 hours a day. i have a sump that uses filter socks and a modded asm g2 skimmer. the only things i can think of to fix the problem are the bulbs and possibly a uv sterilizer. suggestions/recommendations?