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Unread 10/23/2017, 11:11 AM   #2
Reef Junkie
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Join Date: Oct 1999
Location: Somewhere, NY
Posts: 6,595
Going through something similar.
This is really common when the temperature starts to change.

Clean your heater(s). My main heater (I think) was no longer efficiently heating the tank and my secondary titanium unit was completely encrusted with calcareous material. A good vinegar bath for both, but I purchased a new 300 watt heater and cleaned them one at a time.

I also removed and cleaned out my refugium. I saved only the healthy part of the algae. There was an inch of muck at the bottom.

Check everything, but try not to harass the corals. Stressing them more can cause them to recede.

Good luck and post what you find.


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