Opinions on flow for 75?

[ilovesoda]

Hello!

I'm in the works on setting up a 75gallon (48x18x20) I'm trying to decide what type of flow this tank needs. This is going to be a mixed reef, with lps, sps and softies.

Boxing day is coming up, and my lfs has a sale on. :bounce3:

I'm thinking one Koralia evo 1400 on each end of the tank, and another K. evo 750 placed either on the back wall or an end to create more turbulent flow. The return 450gph will be on the back of the tank.

What do you think of this? is this too much flow?

All opinions welcome!

 

[username in use]

I think that will be a really good way to start. If you need more you can always add it, but that's a fair turnover for now.

 

[ilovesoda]

Thanks for your opinion Josh

What do others think?

 

[Crush Coral]

M y 75 has 2 koralia 1050s, one MJ 900 shooting across the back and a HOB skimmer run by a quite one 2200 pump which is too big for the skimmer so I have a ball valve splitting some of the flow off into the tank. Total flow is just what I want and I think your's will be perfect. The eveolutions are real quite but they do plug up and stop running so then I just soak them in vinager for a day, scrub and ready to go.

 

[k7iou]

I just finished filling my 55 gal with a CRC overflow box 600 gph and a Mag 9.5 pump. 1" sched 40 drain from overflow box with ball valve, (I used 1 1/4" valve with reducers as not to restrict I.D.) return 3/4 sched 40, with "T" fitting and another ball valve returning into sump tank overflow box compartment. It's overkill but bigger is better on the flow and dialed in it works nicely. The return with the T and ball valve reduces the head pressure.
I also drilled 2 - 1/8" holes in the return just below the water line to break siphon when for electrical outage, tested several times...works great!

 

[username in use]

The return with the T and ball valve reduces the head pressure.

A "t" in your line will increase the head pressure more than if you had a straight run to an outlet. And a ball valve will increase the head pressure as you close it as well.

 

[k7iou]

A "t" in your line will increase the head pressure more than if you had a straight run to an outlet. And a ball valve will increase the head pressure as you close it as well.

No, because the "T" is 90* off the side and the return is a straight run thru the T so any increase is miniumal. I also used a heat gun and heated the return to give it a slight S curve instead of using 45* or 90* fittings.

 

[unbreakable]

whatever it is you choose, get something with variable flow. youll be thankful when you want to place powerheads in certain areas that may require less or more flow. also if you ever decide to break down the tank or upgrade you can take the powerheads with you to the next build.. some corals like SPS may require more flow so increasing flow may be needed