I had put brains in shaded areas while acclimating them to MH.
They began reseding, I then put them on the sand bed directly under the center MH, and they immediately showed improvement.
In my tank they do not rest under direct flow, but there is good flow in the tank over all. I do feed at least once a week (I try for every other day, but that doesn't usually happen.) a mixture of Rod's Food, Mysis shrimp, Cyclops, Oyster Feast, Rotifer Feast, Phyto Feast soaked in VitaChem, Vit. C, Selcon, and Garlick Extreme. Daily I throw pellets in the tank for the fish, and I have seen the brains actually extend
feeders for those as well.

My tank is not the cleanest, weekly water changes are my only dosing. I run a Two Little Fishies reactor with a mixture of carbon & gfo which I change out monthly.
Tommy I wish you all the best with this brain!! It is absolutely beautiful.
