The alk would be my biggest concern to stabilize. Has your ph been pretty stable with such swings in alk? I strive to keep my phos below .1 I start to see hair algae with higher phos levels.
Like you mentioned on my last visit your stock levels constantly changing could be causing your stability issues.
Jeff
I agree changing stocking levels is likely contributing to the issue. PH is relatively stable compared to the ALK. The tangs keep the algae in check pretty well.
How did the alk hit 15 so fast?
I am not sure what happen to the alk to increase so much. It was weird. I shutoff alk for 1.5 days to bring it back down to 9.5 then plugged back in. After plugging back in thought it would start going up again but it went down and I had to add additional minutes on the timer. Weird.
time for an alk monitor!
I can't wait until the Trident comes out!