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post #2 of (permalink) Old 12-06-2004, 01:53 AM
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Join Date: Jan 2004
Location: Las Vegas , Nevada
Posts: 1,261
Welcome to planted tank

How big is a single bulb nano cube? How many watts is the bulb?

Why do you want to have exact pH of 6.5? Using 100% RO/DI water is not a good idea since it's lack of mineral content. Also it has no buffering capacity. If you have really hard water in your area, you can always mix it 50/50 with tap to replenish the minerals and buffering cap. If you inject CO2, pH will be lowered anyway.

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