300+ gallon tank return nozzle options? Help!

[manakh]

For those of you with bigger tanks pushing higher gph, what do you use for return nozzles? At what point would a 3/4" loc line Y restrict flow too much?

96x30x30
1.5" overflow drains
Jebao dcp 10000 for each side, 1 meter head pressure maybe, the sump is same level as the tank.
1" return pipe each side.
Should possibly achieve 1200+ gph each side ??

Kind of the last piece of my puzzle to figure out for my build. Aside from actually putting it together.
I don't want to restrict it too much and wear out the pump...

I have a dcp 10000 on another tank but turned down to 60% and the water coming out of the dual loc line 3/4" fan and 1/2" fan shaped nozzles is so powerful the 3/4" that is pointed straight down the fish swim around the direct current lol.

I toyed with the idea of a spray bar but I'm thinking a more compact return vs a long pipe...

 

[duanes]

When I want return water to be less concentrated in one spot I put together a PC manifold to spread the flow across the entire width of the tank.
I will probably use a smaller, less obtrusive pipe than the one below, when I redo this one. Although a tank hood could hide much of it.

 

[pacu mom]

I like venturi return nozzles. The flow direction can be adjusted up/down, side to side.

 

[Blakewater]

I worried about this too originally, I ended up just making my own in the end out of PVC as well

 

[duanes]

I like venturi return nozzles. The flow direction can be adjusted up/down, side to side.

View attachment 1399052

I also like Venturi nozzles, they do a great job of combining flow with aeration.

 

[manakh]

I like venturi return nozzles. The flow direction can be adjusted up/down, side to side.

View attachment 1399052

Is that the 1.5"? And what's the size of the hole the water goes through?


These are some good options, thanks guys.

 

[pacu mom]

Yes..for 1.5" pvc

 

[manakh]

How big is the actual hole the water goes through?

Do you have any in tank pictures?

 

[pacu mom]

Sorry, I won't be home until late Saturday so can't give you the internal diameter. We use a Reeflo Hammerhead pump (6,000 gph) so have an extremely swift current in the tank which our fish love. The return nozzle is directed to the other end of the tank. The current hits the wall and bounces back at least half way before it eddies. We love the aeration that the nozzle provides, as it spits out air. We use no aerators.

Our water change system is tied in with the mechanical filtration so the water gets pumped back in. You can see how swift the current is. The fish pretend they are swimming up the headwaters of the Amazon.

This old video is at the end of a water change. Tommy the lutino oscar does a little surfing on his side in the current. The nozzle spits out air periodically.

 

[manakh]

Wow, 6000 gph pushing at the pump before head pressure? I would be aiming for 1200-1500 gph through the return nozzle.