Well...my large reef has been going downhill for several weeks now. I have spent countless hours trying to ID the issue but could never figure it out...until today.
It started with my xenia dying off, followed by most of my SPS
, one clam, a BTA, a LTA, several acan colonies and some sun corals. Most of my LPS
, my mushrooms, zoas, duncan, one acan and a clam are still doing fine. All fish and most mobile inverts are fine. All water chemistry has been fine. I increased water changes and even bought all new CF
lamps. Still...things continued to deteriorate.
The only thing out of the ordinary was my temp. It seemed to Hoover around 72-74. I have two 300watt heaters in my sump and kept turning them up with no increase on my Coralife digital thermometer. Being I live in MN and my tank is topless and in our basement (which is only around 65 unless the fireplace is on) I chalked it up to that.
Today, while doing routine maintenance, I noticed my nano (also kept in the basement at degrees) felt much cooler then my 95gal. I changed the batteries in my digital thermo and it still read 73. So I took the thermometer out of nano and placed it in my large reef...the temp read 88! Makes me wonder just how long I have been cooking my tank.
So I guess the moral of the story is to run out and invest in a second thermometer so you can use two to verify one another. The $20 purchase could save you hundreds and hundreds of dollars in coral and a ton of heartache. One of the nice things about this hobby is that you can learn from the misfortunes of others instead of experiencing it first hand...