Broke down my 250 10yr old tank, started from scratch again. Bleached rock, new sandbed, new rock, upgraded LEDs, new 48" sterilizer, new dose pump controls, rebuild the canopy, and just got back online took about a month. Still trying to get the water balanced, but so far so good. Adjusting Ak dosages. You can see the diatom bloom on the sand, but it all has to start somewhere.