brown heniochus won't eat.

[seashells]

What test kit? we had a Salifert that showed 25-50 every test. We finely tried other test kits and the readings were 0-15. Even had LFS test our water & theirs with the same results. It was a faulty kit. The LFS told us that up to 25 was ok. You could also try live brine shrimp or rotifers to try and stimulate a feeding response.