Personally, I would just add nitrate/phosphate and keep those levels at or above 10 nitrate and .10 phosphate. Not only did this work for me; it is the crux of the entire monster dino thread. I wouldn't use Chemiclean, Dino X, blackouts, or anything else along those lines as those can cause false positives... dinos disappear but then come roaring back, and nutrients spike making you think, "Oh my gosh! I'm killing my tank with nitrate/phosphate!" Only to see those nutrients plummet back to zero in a week or two (been there, got the t-shirt).
If you want to do something additional that might help, you can: 1) Add a UV sterilizer, and/or 2) Add a bacteria product like Dr. Tim's Echo Balance or Microbacter 7, following their weekly dosing protocols. I would include Garf Grunge and the "mud" products in that same category though there is no weekly dosing.
If you want to do something additional that might help, you can: 1) Add a UV sterilizer, and/or 2) Add a bacteria product like Dr. Tim's Echo Balance or Microbacter 7, following their weekly dosing protocols. I would include Garf Grunge and the "mud" products in that same category though there is no weekly dosing.