I live on long island and i lost power for 2 weeks during hurricane sandy. I lost a couple of frogspawn corals and about 70% of my xenia corals. the nitrates rose to about 40ppm. i've been doing weekly 20% water changes and physically been removing as much of the hair algae as possible. however, it just keep on coming back and the tank is infested by it; i can't get the nitrates to stay under 20ppm.
i plan on doing an 80% water change, but i am a little concern about the result that it make cause the aquarium environment, mainly the cycled status of it.
I have soft coral. Frogspawns, xenia, candy canes, and mushrooms.
I am not really concerned about the livestock because they are a resilient bunch. my only concern are the mated clowns because they have hosted the xenia and are currently guarding their eggs (i'll wait until the eggs have hatched, even though the fry won't survive).
i have a 90 gallon tank, about 100 lbs of base rock, a 20 gallon wet and dry filter with no bioballs, and a corallife super skimmer (which has been given me issues, i don't think it's working properly on a consistent basis). 4 bulbs of t5 lighting come on at about 11:30 am and go off at around 9:30pm. i also have about 100 w of super LED
actinic lightning that is on for about the same amount of time.
the lifestock: 1 pink goby, 1 brittlenose tang, 1 clown goby, 2 clowns, 1 six-line wrasse, and 1 melanaurus wrasse. 2 emerald crabs about 12 snails, and I am not sure how many hermit crabs are left. Maybe 4 or 5. I know i need to increase the clean up crew, but i don't wanna get more without the nitrates first going down.
I feed once per day.
the tank has been established for about 3 years.
All input is greatly appreciated.