Amount of flow? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 02-08-2008, 09:12 PM Thread Starter
 
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Amount of flow?

I am trying to figure out what sort of flow i should have going through my 65gal tank. I have a spray bar going across the middle and a rio along the back wall blowing water back towards the intake below the spray bar.

My problem is i can never really get a crystal clear tank even after constant water changes. At the LFS today i noticed they had their input blowing against the back wall with almost 0% water flow around the rest of the tank.

Is this a good idea? What do you guys do?

I have a eheim pro II moving 250gal/hr+ and a rio moving about 40gal+

Thanks.
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post #2 of 6 (permalink) Old 02-08-2008, 09:24 PM
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In my experience, water flow is a very good thing. Stagnant water leads to algae, due to lack of CO2 availability I'd guess.

Crystal clear water is from a good balance in the tank. I know achieving this can be a headache, I had trouble with one of my tanks for the longest time, it would be somewhat clear for a day or two, then turn milky white towards the end of the week. I was dosing EI, had an eight hour photoperiod, good CO2, and still had murky water. I was doing a three day blackout every other week to kill off what I figured was green water, and one day it just went away and hasn't come back. I changed nothing, it just fixed itself.

I don't know how much that helps, but a balanced tank will in time settle down and clear up. What are your specs for that tank?


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post #3 of 6 (permalink) Old 02-08-2008, 09:56 PM
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How long have you had "murkey water"? If you have a relatively new tank it could just be the settling in stage of a tank.

You could also throw in some activated carbon or even better yet Seachem's Purigen. I use it in almost all of my tanks and love the stuff.


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post #4 of 6 (permalink) Old 02-08-2008, 11:28 PM Thread Starter
 
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the tank is well established about a year and a half old. The water is not "murky" its just never crystal clear like everyone elses that i seem to see and or the fish stores.
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post #5 of 6 (permalink) Old 02-09-2008, 01:52 AM
 
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Fine particles and such will not be viewable in photgraphs for the most part, dont judge things based on pics you may see. For one thing its easy to touch up photos.

Do you use a fine filter pad (white floss) in that Pro2?

Yes you want good circulation. It seems to be common around here to avoid to much flow and especially surface flow for the sake of co2. Personally, better flow and yes at the surface too is far more important to tank life IMO than saving a few bucks on co2.
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post #6 of 6 (permalink) Old 02-09-2008, 01:54 AM
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Quote:
Originally Posted by crazy loaches View Post
Yes you want good circulation. It seems to be common around here to avoid to much flow and especially surface flow for the sake of co2. Personally, better flow and yes at the surface too is far more important to tank life IMO than saving a few bucks on co2.
+1.

I have a powerhead at the surface to increase surface movement + oxygenation. I compensate by bumping the CO2 bps up a tiny bit.
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