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As the title states will it work for sand sleeping wrasse are is it too big thanks for the info
It can be done. But I wouldn't recommend it if you are able to choose a different substrate. I had aragonite in my first tank with a red coris wrasse. he was able to bury to sleep but he was always healing some kind of scratches he acquired from the rough substrate. The finer the better.
As a long-shot option, I have seen a tank with a rubble substrate that had a tub of sand buried in the substrate. apparently the wrasses identified the fine sand right away and used it to bed down for the night. The "sandbox" was placed out of the way near the back of the tank. it was a strange aesthetic but not too distracting. just an idea if you are determined to keep a wrasse in your tank and want to go the extra mile.
I've used special grade aragonite for years with wrasses for years with no issues health wise, respectfully. Currently have three wrasses, blue star leopard, Halichoeres chrysus and Halichoeres melanurus, all healthy and fat.
I suppose I only have experience with the larger rubble I once had. my experience may be completely inapplicable to aragonite of a smaller size. I assumed the grain size to compatibility with wrasses was a smooth gradient. but it may be that below a certain size any substrate is fine. I will defer to the experience of reefers with identical substrate to the original question.
Caribsea Special grade aragonite works well. Good size for them. Doesn't blow around easily.
Thanks once again

