Yeah no clue. Ammonia & Nitrites 0, Nitrates around 15ppm, phosphates are 0. salinity is 1.025. Temp has been steady at around 78 (both thermometers show matching readings -- one in the dt, one in the sump). Feeding habits haven't changed, except that I've been using soaking the food in garlic for 2 weeks. I toss in a few Spectrum pellets once a week or so, and only a few but they end up gobbled up really fast by the goby or the cuc.
Nothing new added, and again, fish all accounted for -- healthy and eating. The only thing different is that it's been EXTREMELY muggy and hot outside...but inside, temperature has been constant. But really, that's about it.
I'll probably do a big water change this week. I'm due for one.
EDIT: Could bad t5 bulbs cause any algae blooms? And if it IS an algae bloom, wouldn't it show in my phos test? I have chaeto in my fuge as well, which helps keep my algae in check.