Return pump thoughts

[Patto005]

Ok I have a 190g with a single overflow, it has a 1" drain and 1/2" return. I am currently running a mag 12, my question is could I run a mag 24 and just reduce the discharge diameter to 1/2" at my bulkhead or will this not provide me with sufficient flow since it will basically be acting as a partially blocked valve? And how much flow would I effectively be able to see using this? The bulkhead is roughly 24" above the pump outlet. Or will this not provide enough turnover and I should re-drill the holes instead? I also have 2 mp40's and two more 1200 gph power heads

 

[a6walter1]

Would your 1" drain be able to keep up with the Mag 24? I believe at 2' head the Mag 24 would push 1800 gph, while the 1" drain will theoretically max out at 960 gph.

 

[Patto005]

Would your 1" drain be able to keep up with the Mag 24? I believe at 2' head the Mag 24 would push 1800 gph, while the 1" drain will theoretically max out at 960 gph.

The overall height of my tank is 72" so it would actually have 6' of head. I was wondering if I ran 1" pipe from the discharge of the mag24 to the bulkhead 2' above it, and then reduced it to 1/2" the other 4'-would this cause a problem for the pump and how much flow would I really see. I can't exactly use the head pressure chart from mag bc that's assuming that you are using 1" pipe for the entire length. This is just an option I'm considering, bc I don't know if my current mag12 with 1/2" pipe the entire 6' is giving me enough flow along with the 4 power heads. Another option (last resort) is to drain the heavy tank and flip it over and re-drill a 1" return line and a 2" drain

 

[a6walter1]

Is there any way to just drain the overflow portion and get underneath the tank to drill a larger diameter hole for return?

 

[redfishbluefish]

Here's my thoughts......although MAG's are die-hard pumps and run forever, I'd consider picking up a Jebao DCT 12000. MAG's are energy hogs...without looking it up, relying on my pea-brain, I think a MAG 24 pulls 280 watts. The Jebao is a DC pump that allows you to adjust to 10 different speeds...so you could dial it up or down to fit your needs. The flow at zero head is 12000 liters per hour which calculates to 3170 gph. I suggested the 12000 because head loss drops off quicker than the MAG and you can easily dial it back. I don't like running these things at 100% anyway.


Are you sure that's a 1/2 inch hole on the bulkhead.....or did someone change out the stock 3/4 with a schedule 80 1/2 inch bulkhead?

 

[Patto005]

Here's my thoughts......although MAG's are die-hard pumps and run forever, I'd consider picking up a Jebao DCT 12000. MAG's are energy hogs...without looking it up, relying on my pea-brain, I think a MAG 24 pulls 280 watts. The Jebao is a DC pump that allows you to adjust to 10 different speeds...so you could dial it up or down to fit your needs. The flow at zero head is 12000 liters per hour which calculates to 3170 gph. I suggested the 12000 because head loss drops off quicker than the MAG and you can easily dial it back. I don't like running these things at 100% anyway.


Are you sure that's a 1/2 inch hole on the bulkhead.....or did someone change out the stock 3/4 with a schedule 80 1/2 inch bulkhead?

It's def 1/2". It was ordered as a freshwater tank, could be the reason it's smaller. I will look into the jebao, but I like the mags, I have always had great success with them.