HOB Overflow help

[Bnutz]

Hello all. I'm new to reef tanks and have been putting together all equipment to get my 75g corner flow tank set up. I have an eshopps rs 75 sump, but found and purchased an eshopps rs 200 today. The 200 came with a pf 800? Overflow box. I currently have a 29g standard tank that I as a qt tank. My wife has now decided she wants the 29g in the bedroom. Could I use the pf 800 overflow box and slow the flow down to say 300 gph for the 29g tank?

 

[Water Dog]

Yes, you will have no problens slowing the flow rate down. Remember, the flow rate is dictated by your return pump.

 

[Bnutz]

Thank you. I was just worried that too low of flow would starve the siphon. I'll order a pump in the 500gph range an try it out

 

[Water Dog]

You can probably still use your existing pump. Just install a ball valve to throttle it back.

 

[Bnutz]

I only have 1 return pump. Ill need another for the 29g sump

 

[Sharkman89]

you can also get a smaller utube if the one in the pf800 loses its siphon.

 

[sfin52]

To low of flow with an hob overow may cause it to eventually loose its siphon

 

[Bnutz]

I figured there's min flow required to maintain siphon. Just wondering if its 50% or less? Any pump recommendations around 600gph? Preferably budget related for this trial

 

[Water Dog]

Many years ago, I ran an Amiracle HOB overflow box on my 29 gallon tank. It had very similar dimensions as well as the same 1” U-tube as your Eshopps PF800 HOB. It ran just fine with no issues with breaking siphon. I used a Mag 7 throttled back about 25% with a ball valve. What‘s your budget for the return pump that you’d like for this project?

 

[Bnutz]

Thanks. I'd say like $100 or so for the return pump.

 

[Water Dog]

Then a Sicce Syncra 2.0 or 3.0 will work well for your flow needs.

 

[Bnutz]

Thanks ill look into them

 

[Sharkman89]

Or you could look at some adjustable dc pumps

 

[Bnutz]

Are the jeabo or mighty jet dc pumps ok

 

[Water Dog]

I run 2 Mighty Jets, one for a reactor, the other for my UV sterilizer. Unless you’re using it as a return for an AIO tank, I wouldn’t use it. In a sumo situation, it won’t have enough head pressure capability to push water from the sump up to your tank IMO. If you want to look at a cheap DC pump for your return, take a look at the Jebao DCP line of pumps.

 

[Bnutz]

Dcp-2500? Is this a good option

 

[Water Dog]

I’d go DCP3000 at 792 gph at 11.5’ max head height. You can always turn it down. The 2500 only has a max head height of 8’.