Originally Posted by blindskate
yea..its actually too much ive been told, but i have a 1 n my 20 gallon, i love it
Nope. Not too much. The flow on those is so dispersed versus other powerheads, you can't really compare the gallons/hr figures between koralias and say, maxijets. A Koralia 1 in a 20g is just fine.
To the original poster, in no way would I think 2x koralia 1s in a 29g would be too much. I'd almost say it might be too little, but it really depends on your aquascaping.