Spoor3773
Aquarium Advice Activist
- Joined
- Mar 28, 2011
- Messages
- 143
I ve just set up my first ever tank and decided to go for a Malawi cichlid tank after taking a liking to them when reading up on the hobby. The tank had been set up a month and half when I got this brown coating on my rocks. I carried out a water test and discovered my nitrate levels were high. On discovery of this I completed water changes to bring the level down to an acceptable amount. However after a month of monitoring water quality the coating remains and is still spreading but at a much slower pace. What is it and how do I get rid of it.