Closed Loop Or Not??? What Is Your Flow Rate's

[JDigital]

You've only got about 40x turnover in your 155 by the sounds of it... which really isn't so strong that nothing can like it. It could be more your coral placement, rather than flow.

2500GPH in your 165 is only going to be 15x turnover + return... which isn't enough for SPS for sure.


I would run 4 holes down the middle of the bottom of the tank, and the intake mid-way up the back wall, or at least high enough that its not sucking sand up.. You may want some ball valves before each return bulkhead so you can adjust the flow in each 1/4 of the tank.

Couple pics of how I plumbed mine.



Like I said, run the intake on the back wall, not the floor like me..

[loveless]

In my 330gal I have 2 2500 gal/hour pumps plus a 3600 gal/hour return pump. At this point im still not sure if it is enough. Oh and the 2500's are on om 4ways. You can check my build thread for pics n such

[The Grizz]

Originally Posted by JDigital

You've only got about 40x turnover in your 155 by the sounds of it... which really isn't so strong that nothing can like it. It could be more your coral placement, rather than flow.

2500GPH in your 165 is only going to be 15x turnover + return... which isn't enough for SPS for sure.


I would run 4 holes down the middle of the bottom of the tank, and the intake mid-way up the back wall, or at least high enough that its not sucking sand up.. You may want some ball valves before each return bulkhead so you can adjust the flow in each 1/4 of the tank.

Couple pics of how I plumbed mine.



Like I said, run the intake on the back wall, not the floor like me..

Are you running a 4 way or just teed off the return of the pump?

[JDigital]

Edit.....

It was a Snapper Pump.. it was a closed loop, nothing was T'd off the return. And nope, I didn't have a OM4. T'd to 3 bulkheads w/ ball valves to even out the head pressure at each return outlet.

[BWI]

100% closed loop.. power heads suck...

[The Grizz]

Ok well what i was thinking was drilling in a 1 1/2" bulk head in the middle back, building a 4 port intake (facing up) about 4' long. Then drill in 4 - 1" bulk head returns along the back spaced 1'-2'-2'-2' from leftside of tank wall to the right. Put 1" 90's facing the front so it creates a clockwise flow. Bottom, up the front, towards the back and then down. Was thinking of a 4 way but I don't have the cash because the 155 has not sold yet. I have a return pump that will do 1100 GPH with the length of the return line's I have done.

So long winded but what do you think is it worth it??