powerhead to sweep out deadspots what turnover to have?

[ahkiu]

Currently i'm filtering my 7 x 2.5x 2.5 aro tank (roughly 1000litres as i don't fill to the top) with 2 eheim 2080's but there are a few dead spaces where the dirt isn't getting picked up.

I've decided to install a powerhead to help sweep the tank but not sure what flow rate to go for. At the moment it's a toss up between the hydor koralia 4 (4600 lph/1200gph) or the koralia magnum 5 (6500lph).

which should i get ? Bearing in mind the 5 is twice the price of the 4.

 

[crowconor]

well if its twice the price just get 2 of the cheaper ones then you can cover all dead spots....IMO....if money is not a big factor

 

[ahkiu]

i considered that, but i don't like a lot of "gear" inside the tank and prefer to keep the wires down. I can afford the more expensive powerhead but if the cheaper one does the job i rather not waste it

 

[COLDasICE]

I'd buy the least expensive and try it, if it's not good enough get the bigger model or double up on the cheaper one.

 

[hybridtheoryd16]

A good turn over rate for big fish like aro's and using canister filters would be 6-8 times an hour. So take your tank volume and multiply by 6-8 and then get enough filtration to match that number or better. ----------------Also having mutiple canister inlets and out lets like you do, gives you the ability to move the outlets around to get the best flow. I would have the outlets on each end and the inlets in the middle. And the outlets aimed in about 45degree's. That should give you a decent flow pattern in your tank. To be able to see the flow pattern better, you could take some normal flake fish food and break it up thinner and put a good amount in the tank and watch how it moves around. Thsi way you would no where you need to add flow. i would do this right before your next tank cleaning, so you can get all the flakes out with the vac.