Yep...and the nitrites should be managed below .25 ppm anyway, with fish in the tank.
Mbuna are hardy fish...but severey intolerant of ammonia & nitrites, and elevated nitrates too.
If you get crushed coral make sure it is a fine, rounded grain - some of it comes with oyster shell type fragments and is sharp and coarse. These fish love to sift the substrate and sharp edges can injure them.
Mbuna are hardy fish...but severey intolerant of ammonia & nitrites, and elevated nitrates too.
If you get crushed coral make sure it is a fine, rounded grain - some of it comes with oyster shell type fragments and is sharp and coarse. These fish love to sift the substrate and sharp edges can injure them.