Stabilizing pH in a 10 gallon
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Old 06-08-2004, 04:02 AM   #1
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Lightbulb Stabilizing pH in a 10 gallon

First of all, I just want to say thanks to all that participate in this forum. I have learned a lot just by reading through various journals and other posts. This site is really an excellent source of info for beginners and experts alike.

I've kept live plants for almost two years now. Echinodorus "Rubin", Spiral Val, and Crypt wendtii thrive in my 70 gal with an UGF and side canister filter. Currently I am 'experimenting' with DIY CO2 on a 10 gallon. It absorbs approximately 3wpg and contains Lobelia cardinalis, Aponogeton crispus, Hygrophila lacustris? (AKA - "Blue Hygro"), Crypt wendtii, Spiral Val, and Nymphaea rubra? (AKA - "Dwarf Red Lily") all purchased from my LFS and no fish yet.

On June 5th I connected my 3L DIY yeast CO2 reactor and diffuser. To start the pH was 7.6 with the CO2 rate about 1 bubble every 13 seconds. Even at this slow rate, I noticed a few small streams of O2 bubbles rising from the leaves. I haven't purchased a kH test kit yet, sorry.

June 6th I noticed only minor growth on a few plants. The pH was still at 7.6.

June 7th I came home from work to find noticable growth, over an inch in some cases especially the spiral val and A. crispus. The pH has dropped considerably to 6.6 with the bubble count to 1 bubble every 1-2 seconds. Not knowing the kH, I assumed the CO2 had to be over 30 ppm and added an air stone to increase circulation and see what happened. Within a few hours the ph was back to 7.6 and constant.

I know I can add baking soda to increase the kH and therefore balance the pH, but is there any known way(s) to regulate the CO2 using yeast?

How many CO2 bubbles per minute is suitable for a 10 gal setup?

I am familiar with the pH vs. kH chart to determine CO2 ppm. Fish are sensitive to pH, but are they affected by the relation between CO2 and kH assuming the resulting pH is constant? I'd find out for myself, but I am strongly against 'experimenting' on live fish or any animal for that matter. Obvoiusly CO2 in high concentration is very harmful to fish and likewise to low and the plants do not benefit.

This is it for now. I have many more questions, but I do not want to sound .

Thanks in advance,
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