How do you get maximum water circulation in a tank?

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Freezekougra

Feeder Fish
MFK Member
Feb 18, 2009
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Brooklyn, NY
I am building my an overhead filter and I will get about 4x turnover. I am worried that the powerhead will constantly pull in the same water(refiltering water that was just filtered), while water on the other end of the tank will have ammonia building up.
 
set your filter up so intake is on one side output on the other and the powerhead should be helping with circulation througout the hole tank. what size tank, powerhead, filter(s) are you running?
 
Powerhead is a cap-1200. It seems to be mislabeled, but right now I'm putting it at 300gph until I get a clear answer.

Tank is 75g
I'm pumping water into a 10g on top of the tank and then having it fall back into the 75g tank through gravity. Head pressure shouldn't be that much...it'll have to pump it a foot probably.
Should I position the powerhead further down in the tank or further up?
 
Your terminology is throwing me a little.
Ar you using more than one powerhead ?
Are you using a powerhead/submersible pump to supply water to the overhead sump ?
If so, where is the inlet for the powerhead located in the main tank ?
What is the design and location of the return from the sump ?
Do you have any drawings or pictures of your idea ?
The basic idea is having the suction at one end and the return at the other, but , there are a myriad of ways to achieve the goal.
 
no drawings just seperate the outlet and intake as far as you can to ensure your not suctioning outlet water and position your powerhead so you get good circulation. personaly i have 2 eheim 2217 on each side of my 125 and 2 koralia 4 in my tank so no worries with circulation lol

the filter intake is half way down with a powerhead a few inches away and the outputs are on the sides towards the middle keeping good water agitaion on the surface ill get a pic later if you really interested in my setup do you get the jist of it or did i cunfuse you more???
 
My question was directed at the OP to determine whether he has more than one pump/powerhead as this could have some bearing on the answer(s).
I'm sure your setup is quite effective.
On my 100 I have a simple 500 GPH RUGF and unpowered canister filter that skims the surface to return. This ought to give you a hint as to my age and you know how easily us old farts get confused. :nilly:
 
just get a decent powerhead for circulation. I am running about 1000g/h on my 100g tank.

A member on our German board was one of the few to breed Acestrorhynchus regularly with a current of about 4000g/h in a 300g :eek:
 
well if we going that route then i would advise at least 4X turnover with your filters and whatever you'd like with circulation as long as your not kicking up sand and your fish have spots to rest from the heavy current
 
The cap-1200 was originally purchased as a 550gph pump. Was advertised as a 550gph and the box says 550gph, but the label on the powerhead says 1000 liters per hour(264gph), I did a bucket test and got roughly 300gph. I'm on a budget so I'm hoping it will be enough.

Ar you using more than one powerhead ?
Are you using a powerhead/submersible pump to supply water to the overhead sump ?


I only have one single powerhead, and that powerhead is supplying the overhead sump(aka 10 gallon tank)


If so, where is the inlet for the powerhead located in the main tank ?

Not sure yet(made this thread). It will be at the very left of the tank, but I am unsure if I should put it at the top, middle, or bottom. Also, should the inlet of the powerhead be rotated to face the right side, or to face me(front side)

What is the design and location of the return from the sump ?

The water will basically return through gravity. I am drilling a 1" hole in the tank and putting a piece of PVC in it. My home depot sells 24" pvc pipes, so that will probably reach 3/4 to the end of the tank.

Do you have any drawings or pictures of your idea ?


Not yet, will try to make something up but I'm not an artist lol
 
alright 3 similar pics :D
i am leaning on having the powerhead pull water from the right because it makes positioning the powerhead much easier
sorry for font size...click pics to enlarge

ohfdesign.jpg

ohfdesign2.jpg

ohfproblem1.jpg
 
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