Waste of money!!!!
Waste of money!!!!
Please don't waste your money. Learn from my loss of $125 on these critters.
Last year I tried the berghia without any long term success. I just didn't throw them in my tank and hope for the best, but did a lot of advance research, and went through very careful steps. Such as setting up a seperate tank with limewood airstones for filtration (so that the nudis wouldn't get shredded in a pump), and doing partial water changes every couple days.
I'd hoped to rotate aip infested rocks after the nudis had cleaned them off every few days. It didn't quite work out that way. They did eat quite a few (maybe 75%) over the course of a week, but there was always some they wouldn't look at no matter how long the rock was left in the tank.
The did lay little sprial strings of eggs, which I harvested with a turkey baster and transferred to the main tank on numerous occasions. But that apparently did nothing to get a stable population going.
After probably three months of laboriously rotating rocks and seeding the main tank with eggs, I finally broke the nudi tank down and put them in the tank. My fear that they would get shredded in a pump must have quickly occurred. After the first 48 hours I never saw them again, and the aip population bounced back worse than it was when I started a couple months later.
Here's your solution = I bought a small copperband butterfly, and never had a single aip in less than a week. You might want to try that approach. Much less expensive, faster, and (at least in my experience) highly effective.