OK.. now we have hit on something.. useful..
I would like to recommend you stop using brine shrimp or pellets and shift to frozen cubes...
here is how I do it.. (I'm just one opinion) ..
I have a small square piece of acrylic about 4" square (anything similar will do)
I take out a cube of frozen reef tank food and use a knife to shave off a small amount (the amount as you stated that is eaten in about 10 minutes). I put the cube back into the cube package and back into the freezer. Then I scrape the shavings off into a shot glass of RODI water (or tank water). I feed this to my tank. The exacto knife, acrylic square, and shot glass are a "kit" I keep with my aquarium goodies.
You will find that many reef tankers will advise you that pellets introduce other products to your tank that cause the kinds of problems you may be having.. and brine shrimp are just candy with very little quality food value.
..confession.. just as I did when I had fresh water tanks.. I keep brine shrimp to feed my fish when I have company who wants to see all the fish and other critters come out. .. the little buggers love candy..
In any event, a try at this will do nothing worse that to add one more improvement to your tank.