do i need circulation power head?

[Al404]

it almost the 3rd week of my new tank, about 50L a dinner scapers
i'm using an hang hover filter 250 l/h, i made a little slide so the water will move the surface when came back into tank

i'dump some fish food and i notice that once it fall in front and on ground, rocks, plants it just settle there

i was wondering i should add a circulation pump like a koralia 900, i think is the smaller one

 

[Martin in Holland]

I've used a HOB filter a few times and they worked perfect for me, but you have to hang the outlet pretty low in the water for it to give enough flow. Maybe you have a different type than I have...any pictures would be helpful.

 

[Al404]

Thi is my filter. I add the slide to make water sursafece move and let the water from the out go streight back to the in tube

 

[Martin in Holland]

If the outlet is about 0.5 -1cm under water, that will give the same (probably better) result. How much is the turnover of your filter?

 

[Al404]

is 250 l/h on 40L water, i can't go too high with water level or i will spill water when i get into the tank with my hand

 

[Martin in Holland]

There it is ..... your filter isn't up for the job....10x the turnover of the tank is the rule, in your case this means that you would need 400 l/h filter. You could get a small powerhead (about 200 l/h) to get a better flow/ current.

 

[Al404]

i guess it would be easier to get a new hang hover filter, i don't really trust power head without magnet and the smaller is 900 l/h
i read that eheim are good but design is awful, i guess i will look for aquaclear
or if you have any suggestion

 

[Martin in Holland]

You could also look for a HOB canister filter such as this one http://www.ebay.com/itm/Up-Aqua-External-hang-on-fish-aquarium-filter-canister-/260827337123