Question on Water Changes with C02 Injection - The Planted Tank Forum
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post #1 of 3 (permalink) Old 09-27-2003, 04:45 AM Thread Starter
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Location: Houston, Texas
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I'm about to install my Milwaukee C02 setup, but am concerned about PH swings at water change time.

My tap water is PH 7.2, I need to get to PH 7.0 for the recommended CO2 level (per thekrib).

Is this a concern with 25% weekly water changes? How about with larger water changes? I generally put the hose right into the tank with chlorine neutralizer dropped in near the hose output.


75 Gal, Flourite, Eheim 2217, 260W lights, DIY UG heater, HP CO2.
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post #2 of 3 (permalink) Old 09-27-2003, 01:16 PM
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That wont be a problem even doing a 50% water change.
As a matter of fact I wouldnt even worry much of moving a fish ( not all but most ) from 7.0 - 7.2 or vice versa directly. It would be even more suttle a change through delution with the existing tank water.
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post #3 of 3 (permalink) Old 09-27-2003, 02:00 PM
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Dont worry about a 50% water change. On your tank the change in pH from 7.2-7.0 will be negligible....Remember in the wild where these fish grow there are HUGE pH changes...Rain showers! Your fish should be fine.


100 Gal Planted, two Filstar XP3, Milwaukee SMS 122 pH controller, Milwaukee reg/bubble, compressed CO2, reactor 1000, 7 WCMM, 12 Ottos, 14 neons, 1 SAE, 3 German blue rams, 2 Florida Flag Fish

10 Gallon...20 Endler's live bearers planted, peat/kitty litter/sand substrate

15 Gallon...Just Schultz Aquatic Plant soil
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