My qt just for all to read is a 10 gallon with a $9 HOB filter from walmart, a $10 heater from walmart and about 5 lbs of live rock that goes through the copper treatment. Oh, and a clamp on home depot light. All in a 10 gallon tank. Never an ammonia spike, steady ph, and fits under the stand so I keep it 24/7. I never likes hypo because it didn't seem to work right and made my fish bloated. Sounds like you know more than I. That achilles looks pretty thick so it stands a very good chance I'd think. Hey, sent a pm too.
Oh, and with the emp and ich on the eyes, mine did that too for about a month until I got the cleaner shrimp (main reason) and the emp would sleep near the shrimp. Haven't seen it since. I remember that someone said cleaner shrimp don't eat ich, but the **** was gone within a week of adding one.