Megaflow help?

[SeymourDuncan]

According to the web, they say that the megaflow can handle 600gph max.

I just bought a 90g that has one built in and I was wondering if that seems slow?

My 55 has an hob and it takes 1200gph.

Besides adding a second overflow is there a better standpipe that can handle more? To me it looks like a durso with more holes...I'm not afraid to get rid of the existing standpipe if I can increase the flow rate.

I would assume I should have closer to 2700 gph? I can make up for it with powerheads I course. I just like having the water overflowing faster than the total gph of the powerheads. Works like a vaccuum this way.

This is also the first deeper tank I have ever owned so O2 levels are of concern. If I have to I'll raise the sand bed up 6-8 inches lol. 75g with a basement

 

[Downbeach]

The size of the standpipe isn't restricting your flow, it's the size of the 1" bulkhead that it's connected to, which has a "safe" flow rating of 600 gph. I have a 180, with two of the Megaflow's, and use 2 x MAG 9.5's for returns, so considering head loss, etc., I figure I'm pushing around 700 gph through each overflow, without a problem. Your not going to get more flow from your overflow/returns that will exceed what you can provide for using PH's for circulation. I'm using 4 Tunze PH's, and assuming I'm getting 100% of their rated flow, I'm getting around 5,000 gph with them all running. I run the two larger 6065's on two hour alternating cycles, so I don't run all of them at the same time, or my tank would look like the inside of a Hamilton Beach blender.

 

[SeymourDuncan]

Ok, I will shoot for 700gph.

Just sounds slow compared to my 55s flow rate. I've got plenty of powerheads though.