Catfish are slow to come around to eating sometimes.

Grunty (RTC/TSN) didn't eat here for the first two weeks. If the cats are sitting and not doing anything, they may actually be content for the time being.

I only feed the cats here when they're active and on patrol. So Grunty gets fed once a week. The kitten (5 inch RTC) gets fed maybe twice a week.

I've never had any luck with the garlic thing. I've had much better luck getting live wiggly food. For cats that big, I'd go get a tub of big earthworms. The gigantic nightcrawlers they sell for bait. Just rinse 'em off first.

Mine here also really really like that crazy catfish dough bait. The one I have is called Catfish Dynamite, but I wouldn't feed that to them regularly. Since it's a bait, they don't put the ingredients on the tub. I don't think it will hurt for a snack or to motivate a reluctant eater though.

Also I would check your water parameters and make sure everything is still in line....You have increased your bio load quite a bit....It might take some time catching up....make sure there is no Ammonia spikes and the Nitrate is not up high...post your results so we can see where you are at.

What were the numbers if you dont mind sharing and what type of test do you have?