Slowly Losing Sps

[Gilbert]

ok ill see if it helps.
thanks for the help.

[ACE]

I had this happen to me when I had the 75, it turns out my (Coralife) thermometer was displaying the wrong temp. Instead of 78 as the high temp in my tank before the lights went out it was actually 83-84.

[hobogato]

also, how are you testing salinity? if you are using a swing arm, they can be drastically wrong. if you are using a refractometer, maybe you need to calibrate it?

[Gilbert]

i am using a swing arm... but today im going to drop in a floating thermometer that also checks salinity

[Bill S]

also, how are you testing salinity? if you are using a swing arm, they can be drastically wrong. if you are using a refractometer, maybe you need to calibrate it?

Beat me to it, Ace. I'm almost willing to bet that this is the problem. The dang swing arms should be outlawed.

In any case, a complete workup of your parms is in order. I'd also have them checked at a LFS - test kits are notorious for being off.

[CoryDude]

Swing a cup of your water over to Gabe's. He can test with his refractometer.

[TexasTodd]

There's a ton of issues that could do this.

Generally top down recession is Alk and bottom up is Phosphate unless it's bugs...which you've already check for.

Next would be temp and then flow then light.

What is your ph day/night? What is your dkh and ca? How many times is your tank turning over per hour?

What is the TDS on your RO/DI water?

Frags are one thing, they die easily and sometimes for no reason, but if you have estabilished colonies going you've got a problem.

Todd

[Crazyeyes]

Maybe you should place them in places where they get full polyp extension, it could be where your placing them. Like what people are saying, it could be so many things. My hydrometer that checks salinty and temp is off compared to my refractometer, this I think is where you bite the bullet and get a refractometer your salinity will be the most precise and it will help out the corals.

[TexasTodd]

As long as your salinity is 1.022 or so or higher and steady it shouldn't be causing issues. By mistake in the past I've run up close to 1.30 with no ill effects.

Pollution and temp are the most likely.

Todd

[Gilbert]

ok so i think the problem was the temp. yesturday when i got home i checked it and it was at 86 degree, that dam heater was suppose to keep it at 76.