Overflow question

thenissantech · Mar 29, 2016

Please feel free to chime in on this. I'm building a new system that will be about 300 gallons. The main display is a 210 gallon (72x24x30) and this is where my dilemma is.
1. I'm going to be installing and external overflow. I'm not sure if I should go with a Ghost overflow 16" rated at 1500 GPH or 20" rated for 2500 GPH. Flow in the tank will be provided by x3 MP40's.

2. The tank was set up as a peninsula before. I'm removing the overflow and was planning to use 3/8" glass and silicone to cover holes and seal. Any input would be greatly appreciated.

Midasreefs · Mar 29, 2016

I will first suggest that you drill the tank instead of using an external overflow because it is much more reliable and just overall better. That being said, if drilling the tank is not an option, the amount of flow needed in an overflow is completely dependent on the flow rate of the return pump. If your return pump does 1200 GPH the 16" 1500 GPH overflow would suffice. But because of your large quantity of water (210 gallon display) i would suggest using the 20" overflow rated for 2500 GPH and tune your return pump to 2100 GPH this will give your overflow room for error and circulate your tanks water 10 times per hour giving you very adequate filtration. If you have any more questions, feel free to PM me

jetmaker · Mar 29, 2016

I would suggest 2 of these rated at 1200 each for a total of 2400 gph I love mine quite. H 20 over flow.

thenissantech · Mar 29, 2016

I will be using an internal overflow with drilled glass. I was kind of thinking the same thing as far as flow rate. I plan to use a Dart snapper gold pump. to power the entire system. Its rated at 3600 GPH. It will be powering the display, two frag tanks and three reactors.

thenissantech · Mar 29, 2016

Jetmaker that is a cool overflow

jetmaker · Mar 29, 2016

thenissantech said:
I will be using an internal overflow with drilled glass. I was kind of thinking the same thing as far as flow rate. I plan to use a Dart snapper gold pump. to power the entire system. Its rated at 3600 GPH. It will be powering the display, two frag tanks and three reactors.

You can drill 3 h20s and get 3600 gph

jetmaker · Mar 29, 2016

thenissantech said:
Jetmaker that is a cool overflow

Yup and nothing can get in it and it's quiet it's made by custom aquariums they use it for their own tanks and selling now to the public. They have a drill kit that places it perfect.

thenissantech · Mar 29, 2016

does it have an external box? what is their website?

jetmaker · Mar 29, 2016

Don't need a external box it flows straight to the fuge. Google h20 overflow and you get it.

jetmaker · Mar 29, 2016

Custom aquariums. Com

jetmaker · Mar 29, 2016

I know their is lot that say you need 10x fuge but I disagree I run about 7x but I over skim and I have chaeto to fast won't get nutrients out. But I don't do water changes either so most people will disagree but I've never had bad algae and that's been my method for 35 yrs.

thenissantech · Mar 29, 2016

That's a beautiful overflow but not quiet the direction I want to go. I'm looking at this one for the minimal footprint. http://synergyreef.com/product/20-synergy-reef-overflow/