Originally Posted by
alix2.0
http:///forum/post/2528106
ok, heres another Q.
flow. at the LFS today, i was checking out the overflow in a DT, never really paid that much attention to them before. they have an output like this:
(sorry about my lack of paint skeelz, im tired
)
anyways, i realize this is from the return pump. (right? right?) well i was wondering, is this the way it is on all over flows? not exactly sure why, but i like this.
and also, what are those powerheads called that attach with magnets so the cord is on the outside? are those hydor koralias? i dont want any cords in my tank, so i really like these.
i also want a PH behind the rockwork to make sure i dont have dead spots.
if you need at least 15x turnover in the DT, not counting the one behind the rockwork, if i get a 700gph or greater return pump, do you think two 600gph koralias will be enough flow? that puts it at about 25x turnover, but ive seen people with crazy turnover rates, like 60x.
i will probably end up getting 3 koralias, counting the one for the rockwork, but if i am going to order them online i want to get as many as i will need.
thanks.
almost all if not all overflows are like that. The powerhead with the cord on the outside is a vortec and they are alot of$$$$ I have 2 modded MJs in my 75 and its crazy flow. I would go with 3 koralia #3s if you go with those