GPH with 3/4" return to tank

[Thor2j]

They are not recommending that flow, that is just the size of pump they are telling you to use.

Return Pump Flow Rate: 2000-4000GPH that is their words , but thats not what the pump produces after head height and restriction due to your 1 3/4" drilled return hole.

So do you think co20 is enough?? I'll be running the return through a 80w uv

I have had many tanks in 30 years, and run a 210g right now. Im running 700 through two 3/4 returns

Any more then that and the drain gets noisy, that is a lot of water that is not needed. You dont need 4 X either.

I run a 100G basement sump, and use a DC jebao 3000 gph pump, at 45% capacity. If you use that under your tank, you can kiss sleeping off because you will hear your tank in the next room.


SO for you my friend, you will run a DC pump for a few reasons, but one is AC savings, the second is controllability. You will need to control your flow.

You will run 1 /14" PVC all the way up to the 3/4 fitting which helps DC pumps operate easier. As large as you can as long as you can. You get a jebao DCP 10000 and you will be able to run it at 25% under the tank and have more than enough flow.

I already have 2 cor20s . 1 for a back up. They are completely quiet.

 

[outhouse]

So do you think co20 is enough?? I'll be running the return through a 80w uv

I already have 2 cor20s . 1 for a back up. They are completely quiet.

ya your good. You got it

 

[DCR]

I didn't make the tank innovative marine did, pretty good reputation. My entire point of this post was:
A) WHY is IM advertising their tank with a recommended flow of 2000-4000 gph with a 3/4" return.

B) Can I get 900 gph return with 3/4" pvc. I am a fan of 3-4x water volume turnover . Have had very successful reefs for 30 years. If I go low it would be about 720gph and high about 900. I'll be using a COR 20.

I'm well aware of the charts out there that show gravity max of around 640 gph. What I'm trying to figure out is how much psi reef pumps actually put out. To me it doesn't seem like much.
Thanks

To convert feet of head to psi, divide the feet of head by 2.3. You are correct, it is not much pressure. Reef pumps are largely circulation pumps with very low head - especially the DC pumps. IM obviously does not have anyone that understands fluid mechanics to recommend 2000-4000 gph through a 3/4" line.

 

[AJsReef]

Don't know, never tried.

Turn it up and see, since increased flow is the desired outcome of the thread.

Im thinking the COR will top out before hitting 500GPH

The bigger concern I’d have at 2000+ GPH would be whether the drain line can handle it. The tank has what 1” drain? Gravity max flow is well under 2000 GPH for it :/

Edit - Further reading, IM specs show the regular 200 INT dual 3/4” returns on the left/right top corners with accessible bulkheads. I’d assume IM expect end user to T or Wye plumbing somewhere downstream of the return. This isn’t feasible with the peninsula? Seems like a huge oversight

 

[csund]

I use an Abyzz A100 split to two 3/4” returns. It goes 1” outlet to 2’ of silicone hose then a 1” 45, 1” tee, 90 degree 1” to 3/4” reducer, flow meter, 3/4” 90 to bulkhead. Outlet of pump to tank return bulkhead is about 4’. One outlet is single straight loc line nozzle, the other uses splitter then two straight loc line nozzles.

I control flow via one flow meter usually set at 350 gph (700 with both returns.) I just set nominal to 1000 (so pump would ramp to max) and one flow meter was about 470 and the other 450.

 

[Mywifeisgunnakillme]

I am awaiting delivery of my innovative marine 200 int peninsula. Strangely it only has a 3/4" return that tees off to 2 3/4" into aquarium. IM recommends 2000-4000 gph on their website for tank. First off , I'm a fan of 3-4x tank turnover so with sump somewhere around 900 gph. Can you even get that through a 3/4" pipe?? I asked IM and they were kind of stumped.

A couple Ehiem Universal 1262's with a relatively straight shot i bet would be over 900 GPH total to the tank, one pump for each return nozzle. Pretty cheap and reliable way to do it....

Or Reef Octupus, Bubble King, Abyzz, Versa, etc., would all work to get well over 900 GPH. One thing to help flow would be to run 1 inch pipe from the return pump to the tank, only reduce to 3/4 inch at the tank, then flow would only be reduced to 3/4 inch for a very short run through the tank and flow would be very similar to a 1 inch run the whole way.

You're probably limited by the 1 inch drain as to how much flow you can/need to run. The IM recommendations are unnecessarily high even if achievable.

Personally, like you said, you may not need 900 GPH. I have IM 200 ext and bought an abyzz just so i could easily adjust the flow to balance noise and turnover to whatever i think works best with the system.

I like a little bigger pump than needed so it can run at a lower percentage and so when it gets gummed up over time with whatever you can get more out of it without necessarily cleaning it.

 

[csund]

A couple Ehiem Universal 1262's with a relatively straight shot i bet would be over 900 GPH total to the tank, one pump for each return nozzle. Pretty cheap and reliable way to do it....

Or Reef Octupus, Bubble King, Abyzz, Versa, etc., would all work to get well over 900 GPH. One thing to help flow would be to run 1 inch pipe from the return pump to the tank, only reduce to 3/4 inch at the tank, then flow would only be reduced to 3/4 inch for a very short run through the tank and flow would be very similar to a 1 inch run the whole way.

You're probably limited by the 1 inch drain as to how much flow you can/need to run. The IM recommendations are unnecessarily high even if achievable.

Personally, like you said, you may not need 900 GPH. I have IM 200 ext and bought an abyzz just so i could easily adjust the flow to balance noise and turnover to whatever i think works best with the system.

I like a little bigger pump than needed so it can run at a lower percentage and so when it gets gummed up over time with whatever you can get more out of it without necessarily cleaning it.

That’s true. My Abyzz has been running almost two years and never been cleaned. I don’t run a strainer so nothing to clog up and reduce flow. The pump has a guard/shield plate between the impeller and rotor assembly to keep gunk out. I have yet to take either pump apart since they were installed so not sure how effective that is.

 

[Mywifeisgunnakillme]

That’s true. My Abyzz has been running almost two years and never been cleaned. I don’t run a strainer so nothing to clog up and reduce flow. The pump has a guard/shield plate between the impeller and rotor assembly to keep gunk out. I have yet to take either pump apart since they were installed so not sure how effective that is.

Assuming yours abyzz is set to a particular flow rate, has the pump ramped up to keep that flow rate to accommodate any accumulation on the pump intake or in the pipes over the couple of years?

 

[Thor2j]

A couple Ehiem Universal 1262's with a relatively straight shot i bet would be over 900 GPH total to the tank, one pump for each return nozzle. Pretty cheap and reliable way to do it....

Or Reef Octupus, Bubble King, Abyzz, Versa, etc., would all work to get well over 900 GPH. One thing to help flow would be to run 1 inch pipe from the return pump to the tank, only reduce to 3/4 inch at the tank, then flow would only be reduced to 3/4 inch for a very short run through the tank and flow would be very similar to a 1 inch run the whole way.

You're probably limited by the 1 inch drain as to how much flow you can/need to run. The IM recommendations are unnecessarily high even if achievable.

Personally, like you said, you may not need 900 GPH. I have IM 200 ext and bought an abyzz just so i could easily adjust the flow to balance noise and turnover to whatever i think works best with the system.

I like a little bigger pump than needed so it can run at a lower percentage and so when it gets gummed up over time with whatever you can get more out of it without necessarily cleaning it.

The 200 peninsula only has 1 3/4" return

 

[Mywifeisgunnakillme]

The 200 peninsula only has 1 3/4" return

no, mine has two.

 

[Mywifeisgunnakillme]

no, mine has two.

The internal 200, unlike my external, only has one 3/4 return.

That's a design flaw IMO. You can have lower return rates or pump a lot of water through it--it will just have higher velocity coming out. Or drill the acrylic and/or glass to create another outlet. If you need to drill the bottom, make sure it is not tempered glass there first!

 

[KStatefan]

I'm well aware of the charts out there that show gravity max of around 640 gph. What I'm trying to figure out is how much psi reef pumps actually put out. To me it doesn't seem like much.
Thanks

1 foot of head pressure equals .43 psi. I should have read page 3 before posting, I see @DCR answered that question also.

I think IM recommends way to much return flow. I have the EXT 100 and the recommend flow rate is 1000-2000 gph. I run 450 gph.

 

[csund]

Assuming yours abyzz is set to a particular flow rate, has the pump ramped up to keep that flow rate to accommodate any accumulation on the pump intake or in the pipes over the couple of years?

My controllers are mounted to the back of the stand so I don’t check it often. I use the return to feed the display, frag system, carbon/gfo reactors and feed water for probes so the demand is always changing. I can’t say that the GHL flow meters are accurate but they are consistent. I have never had to adjust overflow unless I changed the amount of water sent to DT.

 

[juarec0201]

1 foot of head pressure equals .43 psi. I should have read page 3 before posting, I see @DCR answered that question also.

I think IM recommends way to much return flow. I have the EXT 100 and the recommend flow rate is 1000-2000 gph. I run 450 gph.

Old post sorry. I’m having trouble with my flow using IM’s flare nozzles. Ran 1 inch return on separate pumps reduced to 3/4 to the nozzles. Thinking of switching to rfg. I have 420 ish out of each. Just wondering what flow and how you have them pointed. My lps do not like the flow however I was running them this high due to algae issues on the sand bed that have finally resolved.

 

[KStatefan]

Old post sorry. I’m having trouble with my flow using IM’s flare nozzles. Ran 1 inch return on separate pumps reduced to 3/4 to the nozzles. Thinking of switching to rfg. I have 420 ish out of each. Just wondering what flow and how you have them pointed. My lps do not like the flow however I was running them this high due to algae issues on the sand bed that have finally resolved.

I run about 250 on each side. Target 450-500 gph thru the sump. I use kleven's nozzels and have them pointed about 45 degrees in form the side.