I just started a 90 gallon aquarium. Got the whole thing set up around December 18th? I got live sand, one piece of live rock (others are bulk rock) got water from my LFS (I believe it was sorta cycled at the time) I let my tank cycle and get established. Happened around the 23rd. Ammonia was 0 pH was 8.0 right in the middle. Temps are currently at 77 F (I keep it a tad higher because it’s cold in the basement so really the tank is about 76 F) I got a few fish and inverts and coral the 24th and a few more the 30th by moving my fish from my 10 gal into the 90 gal. Currently my tank has 2 Clownfish, 1 firefish, 1 yellow clown goby, 2 yellow tangs, 1 purple tang, and a powder blue tang. A few cleaner shrimp. Peppermint shrimp. Brittle star fish. Purple lobster. Some crabs. I have been very careful to watch to make sure my tangs don’t get ich. I have done research on this and know that tangs can get ich. A myth is that they get it from being stressed. Ich has to be present in the aquarium for the fish to get ich. I’m not sure if it was dormant in the sand or on the rock or the coral or the water, but I noticed yesterday night a couple little white spots on each fish. Only a couple, so it hasn’t gone crazy in my tank yet. Only the tangs have it. I’m not sure what to do or how to keep the fish healthy and happy and remove this. So far the fish seem fine. The powder blue is happy and swims up to my face when it sees me. The tangs don’t hide or aren’t afraid of me when I come up to the tank and the fish eat too. A lot actually since they are switching from the LFS food to my own food. (They’ve not been interested in the food for awhile but the last few days they finally decided to eat and they eat a lot) my food has garlic in it too which I’ve heard helps with this. This is what I need help with or need to know. I want to stop this before it spreads and I want to keep my fish healthy and happy. They seem fine now but I’m not sure if it will last. I’ve heard fish can become immune to ich. Do I wait it out? Hope the fish can fight the next wave of ich after the ich drops from their body’s and reproduces? I don’t have a big enough QT tank for all the tangs, and I can’t fallow my tank. Because if this I’m not sure what to do. I know ich solution can harm coral and I don’t want to do that, but I could remove the coral from the tank too. I’m not sure what to do. I need an easy safe solution. Not something crazy like destroying my DT and putting all the fish in a QT and waiting it out for 6 weeks. Anyone have any experience with this???