Overflow On Fw Tank Vs. Canister Filter Inlet

HI guys

I'm intending on building an overflow (into sump) for my 250litre freshwater tank and was wondering how effective the system would be for filtration sucking the water from the surface rather than sucking it in from lower in the tank (as in canister filter inlet tube)?

I understand that in a saltwater tank debris floats more - so would LOVE some responses.

I'm fairly OCD when it comes to water quality and am really looking forward to setting up my sump with wet/dry, K1 etc. compartments but would love to hear from someone who has a similar overflow/freshwater setup and how well the system filters - and if I need to get used to the idea that regular vacs will be the only way to keep sand poop free.

Thanks heaps!

 

I prefer sumps and enjoy the benefits of a larger water column. Depending on current in tank depends on how much debris stays on substrate. I have air stones in both corners near overflow. It helps to pull SOME debris up. But gravel vacs still need to be weekly, bI weekly at min. But I do weekly bc of a heavy bio load and large fish poo.

I have dual overflow boxes on drilled tank 1inch stand pipes. Running an 1800gph pump. Most likely pushing 1500 gph.

 

Pulling from the top keeps film on top from forming. Getting good circulation might be a problem do you plan on any powerheads? I would recommend a hob filter with intake extended to bottom. If sump dies you have a backup.Will make sure all water is treated and help even temperature through tank. Only downside is cost and a small hob is pretty cheap to buy and run.

 

As long as output is properly placed circulation shouldnt be hard to obtain. I have good circulation in my 150.

 

Thanks for the wisdom! I might get a powerhead/wavemaker for increased flow. ;-)