N nenzi71 Member Dec 29, 2012 #1 My sand in my sump turned pink over the last two days only where the light hits it. Its a very light pink color. Not red slime algae or Coraline. It is a mature system and all water test are normal. Has anyone seen this?
My sand in my sump turned pink over the last two days only where the light hits it. Its a very light pink color. Not red slime algae or Coraline. It is a mature system and all water test are normal. Has anyone seen this?
