One more sump question.

[stymie]

As some of you may have read from a previous question, I have a drilled tank with sump filter below. I bought it used so I don't know that much about it. This question pertains to the plumbing inside the bulkheads. The inlets are telescopic. Right now I have them raised to the top, but I could probably adjust them almost halfway down. Do you know if the inlets are telescopic because they are one size fits all - or do they have something to do with flow rate to the sump? I'm thinking if I pushed them halfway down, the flow rate would increase due to gravity. I've attached a pic of a spare inlet so you can see what I am referring to as I may not be calling it by its proper name.

Once again, thank you in advance.

 

[stymie]

Bueller, Bueller, Anyone?

 

[Ancient_Fish_Master]

maybe its just so you can control the height of the water in the over flow?

 

[stymie]

I'm not sure. I thought maybe the amount of water that gets filtered per hour might increase if I lowered it. The top of the bulkhead appears to work like a dam. Right now, with the inlets raised to the top, the water level in the tank and inside the bulkhead are almost level. The flow of water from the tank to the inlet is steady. It kind of just meanders over the dam. My thought is this - if I lowered the inlet, it would produce more of a waterfall effect inside the bulkhead and since this is a gravity fed system, the speed at which the water from my tank enters the bulkhead would increase. And if so, does this increase the GPH and improve the filtering of my tank. At the very least I would think this produces more surface agitation and increases oxygen. My concern is - if in fact this really does increase flow rate, will I be pushing my sump to the limit and increase the chances of it flooding - or is the sump is only able to process so many GPH and raising or lowering has little if any effect. I was hoping someone with experience in this type of system could provide some input. Thanks.