Please critique this auto waterchanger design. - The Planted Tank Forum
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post #1 of 2 (permalink) Old 07-21-2007, 06:30 PM Thread Starter
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JohnInFlorida's Avatar
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Please critique this auto waterchanger design.

Hi all, I need to hear all the reasons this won't work. I wouldn't

mind if everyone said it will work just fine, but I'm sure you guys

can blow some holes in the plan.

I'm in the process of installing a 180 gallon acrylic tank in my living

room. It's used, I got it for dirt cheap and it's pre drilled with 7

holes in the bottom. Two of the holes are inside an overflow

baffle/box, the other five are open to the body of the aquarium.

Four of the five in the body of the aquarium and one in the overflow

I have plumbed to a common pvc manifold that feeds the inputs to

two XP3 canister filters. The canisters return water to the

aquarium via 2 spray bars. The last hole in the body of the

aquarium is plumbed to waste.

That leaves one 3/4" bulkhead fitting within the overflow box that

I'd like to use for auto waterchange purposes.

I plan on drip feeding new water into the aquarium (household

water supply is from a well so there are no chlorine/chloramine

problems to deal with) at a rate that will equal 100 gallons/week,

(i.e. 1 to 2 drops per second). What I am questioning is the drain

part of the system. The diagram below shows the plan I have in

mind. The backup drain point is 1/2" above the desired water level

and is only there in case the #1 drain point clogs. I plan on using a

coarse sponge over drain point #1 which I will rinse out weekly. I

dose my other aquariums using the EI method and I plan on dosing

that way with this one as well, except for the ongoing waterchange

equal to 100 gallons per week instead of the weekly 50%

waterchange that I do on the other aquariums.

Ok, the firing range is open, shoot it down before I plumb it it.

Thanks in advance for looking and for all the good advice I'm going to


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"Life is hard;
It's harder if you're stupid."
.................................John Wayne
disclaimer: When I took "The Dukes" quote as my signature, I was thinking of me, not you.
JohnInFlorida is offline  
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post #2 of 2 (permalink) Old 07-21-2007, 09:54 PM
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Mechanically it looks like it will work excellent and you seem like you have a very good idea here.
Now in tune to your aquarium I don't see why it wouldn't work.
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