What size water change? - The Planted Tank Forum
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post #1 of 36 (permalink) Old 06-15-2006, 06:46 PM Thread Starter
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What size water change?

For a 60 gal planted heavily stocked- per week?
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post #2 of 36 (permalink) Old 06-15-2006, 07:02 PM
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Do you dose ferts? Do you have pressurized CO2 injection? Do you dose EI?
If so, I would do 50% Weekly.
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post #3 of 36 (permalink) Old 06-15-2006, 07:11 PM
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Ive found its not so much the amount that matters, just that you do it at all with any kind of frequency
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post #4 of 36 (permalink) Old 06-15-2006, 07:32 PM
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50% a week seems extreme. I do a 5-10gals a week and sometimes skip a week on a 65.
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post #5 of 36 (permalink) Old 06-15-2006, 07:39 PM Thread Starter
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Hi Fresh_newbie yes, I dose the entire flourish line , C02, right now I am doing the seachem fert schedule
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post #6 of 36 (permalink) Old 06-15-2006, 07:55 PM
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ei relies on large water changes. That said, I seem to have some nitrate sponges (mounds of floating riccia) at the moment, so have been neglecting my tank (60% change every other week) for a couple months with minimal ill effect.

58 gallon oceanic, Kessel 360 tun sun, pressurized co2, eheim pimp #179 - 2217 and diffuser
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post #7 of 36 (permalink) Old 06-15-2006, 07:56 PM
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I feed my fish heavily and my tap water is loaded with nitrates and phosphates. When I dosed EI I changed my water 50% minimum weekly. Now its 60% twice a week.

Changing water often and in high volumes would be a good thing for the fish if there are any in there

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post #8 of 36 (permalink) Old 06-15-2006, 08:20 PM
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Since you are dosing, I would do 30-50% weekly, and more if you notice ill effect, as per Georgiadawgger. You will get to know you tank and know what is necessary, but if you are dosing EI, 50% weekly on a heavily planted tank is NOT extreme.
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post #9 of 36 (permalink) Old 06-15-2006, 09:05 PM
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I follow a half-assed EI approach combined with a half-assed Walstad method (works for me, as I have lower light-- just over 2 wpg and I don't want to trim often). I dose dry ferts in much smaller amounts, use excel, and am reducing my filter media to mechanical only. I change 5-10 gallons/ week on my 55 gallon. Although right now my nitrates are sky high, so I've upped my phosphate levels (they were too low anyway) to increase the uptake of nitrate, and I'm doing 5 gallon water changes/day.

One reason why I like to do small water changes is to keep my PH near 7.0 and to use tap rather than RO water. My tap water is 8.8 out of the tap, 8.0 after being aerated overnight. A big water change would increase the PH to 7.5 (if I did 50%). If I do small water changes, then the PH doesn't increase at all.

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post #10 of 36 (permalink) Old 06-15-2006, 09:21 PM
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Quote:
Originally Posted by btodd43
For a 60 gal planted heavily stocked- per week?
I am sure you are more confused now than before you posted your question.
so far 50% weekly ,then 50% is too much, 60% every 2 weeks to 60% twice a week .and probably everybody is right as far as their tank goes because they got to know their tanks and used common sense and considered the plants needs ,the bio load,the amount of fertilizer, and so on.
I suggest you do the same thing ,use your common sense , observe your tank ,if you have a lot of fish then start with 40% a week and see what happens,if you start seeing algae building up then do 50% a week,or maybe reduce your ferts doses a little,there is no magic percentage of water change that will guarantee an all around healthy tank with healthy plants and fish,but i would say 40% or 50% a week is a very good start for you tank.
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post #11 of 36 (permalink) Old 06-16-2006, 12:03 AM
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The primary reason for the weekly 50% water change with EI is to reset the fertilizers ppm in the tank, so even if you are dosing too much no fertilizer element will go way high. If you do 50% a week, the highest it can get is twice the weekly dosage.

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post #12 of 36 (permalink) Old 06-16-2006, 12:52 AM
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Quote:
Originally Posted by fshfanatic
50% a week seems extreme. I do a 5-10gals a week and sometimes skip a week on a 65.

Way to little. I follow the EI and I change roughly 40% but no more than 50%

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post #13 of 36 (permalink) Old 06-16-2006, 01:21 AM
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You lost me. EI?
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post #14 of 36 (permalink) Old 06-16-2006, 01:45 AM
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Quote:
Originally Posted by fshfanatic
You lost me. EI?
EI= Estimative Index dosing. Tom Barr came up with this form of fertilizing that basically falls under the premise that you can dose heavily as to not have to be precise and rely on test kits, then on the 7th day if you change 50% of the water, you reset the water parameters, even if you overdosed ferts throughout the week. This is a lax way to get everything you need for your plants, but not overdose and make it non-beneficial for plants and fauna. Read this sticky and it will go into some detail. https://www.plantedtank.net/forums/wa...-regimes_.html also go to tom barr's site www.barrreport.com
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post #15 of 36 (permalink) Old 06-16-2006, 02:31 AM
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Interesting. Thank you.
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