Filter Gph

[eduller]

So I won a 120 gallon aquarium in a raffle, and I'm combining my 25 gallon community with my 55 gallon community into this tank, plus increasing the size of a couple of my existing schools.

The fish are all compatible - all just regular, peaceful community fish. The tank will be well-planted, but not so heavily as to be a jungle. I will be doing pressurized CO2 (using an inline CO2 reactor). I do also have 10 panda garras which I know like faster currents, but they're happy with the 350 GPH canister in my 55 gallon right now.
 
The tank came with two 75 gallon Whisper HOB filters (which I am cycling in 30 gallon bucket, just about done with the cycle), and my 55 gallon tank currently has a Rena Filstar XP3 filter which I will move over to the big tank. I Altogether that's just over 1,000 gph, going by manufacturer's stated specs. I feel like that's a decent GPH, but apparently I really need validation from other people because I just had to post the question for some feedback. I'll be able to have multiple areas of water flow, so no dead spots. Seems good to me, eh?

 

[elmo666]

Most data I've read advocates 6-10 times tank volume turnover per hour, so yeah, you're well within that range. However, this needs to be halved, if not less, if you're going down the route of fully planted. With co2 the last thing you need is too much surface agitation which will drive off the co2. I split the return utilizing my inline diffuser into 2 using a y piece low level in a central position to get an even distribution. Your right in not wanting any "dead" spots, as a slow, even flow throughout the tank is desirable. You'll find it's a case of trial and error to get it right. I put a couple of drops of methylene blue in next to my uplift to see how the returning flow moved through the tank, I found this most helpful.