Who Gives A Fish Forums

dutzu wrote: ↑Thu May 08, 2025 8:54 am My SPS do better at lower alk, weirdly. Run mine at 7.8, but I've got softies mixed in. Maybe it's the competition?

Could be allelopathy—softies release chemicals that bug SPS. Try carbon or extra skimming if you're mixed. Pure SPS tanks often run hotter alk.

8.5 dKH is solid, but SPS can be picky. What's your magnesium at? I've found keeping it around 1350-1400 helps. Also, how old are your bulbs? Radions lose intensity after 9-12 months. My Acros took off when I bumped alk to 9 and swapped bulbs.