For Dino's, I read an article written by Randy Holmes Farley. I'd suggest you check it out. I used his idea of raising the ph in the tank using a Kalkwasser slurry to keep the ph at 8.4 or 8.5. Then I manually removed as much of the snot as I could. Do not blow the stuff off of the rocks unless you want to make your problem worse. Then I would leave the entire tank dark for 2-3 days at a time. Then I would run the lights for about 4 hours a day for 3 days and then repeat the process. It took forever but I finally got rid of them after a month.