Agree that PWCs are your best friend righit now. Treat the tank like it's a new QT tank that requires 2x/day 20% PWC
's until the biological filter is able to handle the bioload. Any measurable ammonia or nitrite is harmful to fish. Nitrate is much more tolerable to fish (up to 80 - 100ppm).
Here's my 9 (still deciding on #10) rules for SW
Rule # 1. Nothing Good ever happens Fast in a salt water aquarium
Rule # 2. Don't add anything (supplements/chemicals/minerals)you don't test for first.
Rule # 3. PWC
(Partial Water Changes) are your friend, and cure many ills.
Rule # 4. QT EVERYTHING before adding it to your tank (mandarins excepted, corals should be dipped)
Rule # 5. Use only RO
water (either buy it or make it)
Rule # 6. All animal species live longer on a 30% reduced caloric intake. Only feed every other day at most (fish species dependant)
Rule # 7. Hyposalinity is the best, safest, and most effective treatment for marine Ich (IMHO
Rule # 8. A Refractometer is a MUST HAVE, not a luxury.
Rule # 9. Anemones will never live anywhere near their normal (aprox 30 years) lifespan in a home aquarium. Leave them in the ocean