It's not just a single head. 2 of the 3 heads have bought the farm now and the last one isn't doing well. I even split the heads and put them in different areas of the tank. This morning I turned off one of my powerheads to see if that will help.

Have you replaced the test kits? I found as someone else mentioned that there can be a huge difference in readings between test kits. I like the salifert kits but I haven't tried elios. I'd suspect some worm or a crab or even a fish if your water tests out. Clams like higher nitrates, anenome don't (usually) frogspawn should be in the middle, and for what it's worth my frogspawn survived some serious neglect at my hand that killed almost all the sps in my tank so again I'm suspecting some worm, crab or fish. Watch your tank at night, flashlight and some popcorn and keep an eye on the last remaining head. One final thought, do you feed your frogspawn? Try feeding it directly, some mysis shrimp for example, just one or two and see how that goes. Perhaps it's not getting enough food.

Douglas

Test kits are new and Kevin@ Red Coral tested and confirmed my readings. The heads are not getting eaten, they look like they are just sliding off. Forgot to mention, the heads seem to shrink up tiny tiny. They never seem to inflate.

can you clarify "good flow" for me? what are you using for return, powerheads etc and how are they placed in your tank. Maybe too much flow through out the entire tank

Seio 600 on the back left pointing straight down, Seio 1100 top right corner pointing straight across. Return pump is a ...... umm a Quiet 1 6000 I think.

alright, so where in the tank have you tried? Try placing it near some LR that can redirect any direct flow. Mine have always been most successful where there is very minimal flow actually. Just kind of wiggling.

I have tried a bunch of diferent spots. Hopefully turning of the one Seio will calm the water enough to test this out. If not tomorrow I turn off the 1100 and leave the 600 running.
My tank has pretty steady flow all around. There doesn't look to be any "slow" areas. Will let you know how the experiment went tonight.

Thanks

What method are you using to supplement Ca and Alk? At 11DKH, your alk is much higher than I like to see mine at. In fact, some of my SPS tips die back if I get much over 9DKH.

Like the others, I find frogspawn and hammer easier to keep and less sensitive to these kind of things.

I support other's idea that they don't like a lot of flow hitting them directly.

I have cut down on the flow through the tank and will keep everyone updated about the last head.