96 Civic LX - Transmission problems/questions

Hey all. Just got a 95 Civic lx (auto) with 164k miles. My main problem is not being firmiliar with honda's and how to check their ATF. My manual says at normal temp, shut off. I checked it a few days ago and seemed low, so added alittle bit. When I check it now, like the book says; it seems fine. However, when idle (as I've always been use to) it looks aerated and alittle high. When I look into the dipstick hole, there is a constant stream of fluid circulating, and when shut off, it aerates for a moment and then is normal. Just wondering if I have anything to worry about. Or, if I am just reading too much into this.

Seems to drive decent. Alittle underpowered, but then again, not familiar with honda's that much. Especially higher mileage ones. I'd appreciate any advice on what to feel and hear/look for as far as transmission slippage, or anything of that nature.

Thanks, Chris.