Mushrooms shrinking coral

[Aries360]

Any ideas on why my mushrooms would particularly be shrinking? Leathers doing great. I don’t dose and use NSW. They were slow to grow when compared to my friends tanks. I’m kinda limited to mushrooms and leathers due to the Queen angel I have. Hydra 52s x3. 360 gallon. Huge water changes every month and I don’t want to dose. Was thinking a calcium reactor . Main priority is fish
Alkalinity - 2.2 meq/l 6.2 dKH
Calcium - 430
Magnesium - 1400

 

[Ron Reefman]

I think your alk is kind of low at 6.2dKH. I run mine at 9.0 most of the time. It's a bit high, but the sps & lps corals seem to like it. And IMHO, calcium reactors are a giant PITA! But that's just me.

 

[shakacuz]

yeah, i would retest ALK to see if that reading is accurate. ALK seems too low.