Do I have enough current?

[asilefx]

With the rating of Low - Med - High - Strong current.

I was wondering if someone could tell me what classification my tank falls under.

75 G

My main pump for sending water from the sump to the tank is a 1300 GPH pump.
The head on it is about 2.5 feet, and there is 1 90 degree turn. It splits off into 2 return valves. From the middle of the tank the valves point to the corners.

In the tank I have 2 300 GPH powerheads, with rotating deflectors on each side, and a 100 GPH pump in the back center under the returns.
All 3 powerheads are on an ocean timer. 2 pumps run at a time, usually the center plus one side, then they switch.

I am looking to purchase corals that require a High to Strong current, is my system up to par?

Should I just place current loving corals in the direct flow?

Do you think I need stronger powerheads?

Thanks everyone!

[rashr]

By all calculations you have plenty of movement (30 times your tank volume). Flow is definitely important especially for SPS corals but the main thing you will want to view and not in your tank is if there are any deadspots....this is important too. This is deifinitely a high flow tank. You may want to drop some flake food in (ground very small) and watch how it goes through out your tank....I do this ever so often to make sure all of my tank is moving and there are no dead spots or at least limited. This will change anytime you add corals, rock, or have coral growth. One thing you don't want to do is put a coral in the direct path of any power head...the velocity is too strong and will damage your coral. What are you wanting to put into your tank that requires high flow?

[asilefx]

I am mostly looking to ad SPS coral.

[rashr]

Then yes.....technically you have enough flow (too much for LPS tank) but like before.....you will want the whole tank to have flow of some sort and be able to reposition your power heads when your growth starts impeding your flow pattern. I also would change out the 100 gph power head for a 300 or higher power head. I have a 90 gallon (similar dimensions, just 4 inches taller) and I have two returns with a SQWD at a flow of 700 gph and then I have 4 MJ1200s positioned like so.....1. low and in back to insure no build up in back of rocks, 2. on top middle center pointing at front wall to create turbulant flow and movement of surface. 3 & 4 The other two are in the corners pointing opposite corners for example....right rear facing left front. I am looking at trying to find two eductors for my power heads to increase flow and disperse it so it is not so much of a piercing stream. It is a playing game and one that only you can find the optimum position will be based on your rock foramtion and coral/coral growth.

[asilefx]

The 100 GPH pump was an extra that I just threw in, I'll be replacing it soon.

Thanks for the help!