HOB overflow / sump setup reviews ?

  • We are currently upgrading MFK. thanks! -neo
Is a HOB overflow better then say a DIY pvc overflow ?

They will both flow the same depending on pipe diameter

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"And if I can't have everything, well then just give me a taste"
 
Either is fine.

PVC will be cheaper

The box will take up more room in and outside the aquarium.

But its really in the setup on how well it will work.

Worst case scenario is power outage right?

1. Siphon will continue until tank water level is below the overflow box so siphon breaks and your sump contains the 20 gallons or whatever depending on your didplay size

then


2. Siphon breaks and pump comes back on when power is restored. The pump is separated from the main sump so only a few gallons are pumped back until the chamber is below the pumps intake and pump burns up :)


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"And if I can't have everything, well then just give me a taste"

well display is 72x19x24 so roughly 150g biggest tank I can fit in my stand due to other crap in it is a 30x13x19 OR 29x16x19 (door hinges are big and in the way lol) would that sump be sufficient enough then for a 150g ? i'll still keep my canister on the tank likely as well.

so if building a DIY pvc overflow I should have drain set 1/2"-1" below water line ? and have couple 1/8"holes drilled in just a hair above the drain then to break the siphon during power outage ? and likely a check valve inserted in the top of the drain hooked up to my extra maxi jet powerhead to suck air out and help restart the siphon when power comes on right ?

is there a chart somewhere that shows the size of pipe needed for "x" amount of flow ? I think ideally 800-1000gph should be sufficient enough for a 150g tank
 
You're going to drill your siphon break hole above where ypu think you will need it because your sump is going to already have some water in it from normal operation.

So its probably better to make the break higher up closer to the waterline. Then you can fine tune the flow from the return with a valve so your levels in/out are consistent.

Also yes bet on 800gph return loses gallons the higher the height so probly looking at 500gph at 4' (depending on pump of course)

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"And if I can't have everything, well then just give me a taste"
 
ah nice very good site there showing different style and etc bookmarked it !! does it matter how big of a sump I actually use ? I mean I cant really much under my stand I have due to it being 12" wide in the centre support, so im thinking bout a 30" x 12.5" x 18" tank. Do you think that should be large enough to house two 1" drains into socks, and then overflow into a centre section where all my media will be kept then flow into the last compartment were the return pump will be
 
Why not drill them? It's easy!
 
Drill a hole in the back panel of your aquariums glass. Install a bulkhead and run your PVC drain that way.

Then you dont have to worry about losing siphon.



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"And if I can't have everything, well then just give me a taste"
 
Drill a hole in the back panel of your aquariums glass. Install a bulkhead and run your PVC drain that way.

Then you dont have to worry about losing siphon.



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"And if I can't have everything, well then just give me a taste"

well I could but I have fish in the tank right now, and ive never drilled a glass tank before lol
 
I would drill it, I HATE those HOB box's... you can never get them to flow right the first 300 tries and you have to go through all the BS every time you do a water change!!! Not for me..

if the tank does not have a built in over flow it will not have a sump on it for me.... FX5 or 405 depending on the size of the tank!!!
 
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