my tank dont look so great anymore

The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.

30_gallon_guy

Aquarium Advice Regular
Joined
Feb 9, 2005
Messages
53
Location
toronto
Iv got a 30 gallon reef tank its been up and running for about 7 months. Iv got some candy cane, leather, and colt coral, oh and one favia brain. Iv got coraline growing but now my sand is turning yellow and dark in places none of it is white. What could cause this?
 
Back
Top Bottom