GirlinWayside
Fish Fanatic
Im assuming these are calcuim deposits - its really bad - I can scrape them off and within a week, they are coming back. Its white, crusty and flaky - is there something I can do to prevent this?? My hood and light system are ruined and will have to be replaced for the tank to look good but I dont want to get new ones until I know how to keep it from happening again.. 
