We picked up a hammer about a month ago. I first had it in my main. I lost a head or two. We moved it to the stock tank. Lost another head. Moved it up to my 65 and it is really beginning to rebound. In each tank I moved it around 2 or 3 times trying to find lighting/flow that kept them happy. No idea what the final clincher was for them, but they're much happier now.
both look pretty good. That being the case your Mag is probably fine too. Recent water changes would give you the trace elements you'd want. Try running some carbon? Change location? Change Flow, lighting (more? less?). How long have you had them?
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