I did the water lowering method last week and caught all but two(firefish and a watchman goby)in my 400gal reef. I have set up a trap, a small fly hook with bait, and I just dropped the water down again today, but still no luck catching the last two. What do you think the chances of ich surviving in the tank with just these two fish? Both are very healthy, show no signs ich or anything else, and both are eating like pigs.