Just Starting Out With C02 - Help Would Be Appreciated - The Planted Tank Forum
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post #1 of 2 (permalink) Old 10-03-2009, 07:15 PM Thread Starter
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Just Starting Out With C02 - Help Would Be Appreciated

Hello all,

I have been browsing this forumn for a while and have got totally lost in all this c02 injection stuff... but i have just purchased the Red Sea C02 bio-generator bottle thing because i wanted to start basic.. does anyone have any tips for me? i havent got any ph testing kits yet or anything sophisticated like this..

Ive been scared by the decreasing ph levels to be honest, i was just gonna plug an play now i am a little unsure.

Any help would be greatly appreciated for a noivce

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post #2 of 2 (permalink) Old 10-03-2009, 09:17 PM
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That "bio generator" is just a manufactured DIY CO2 setup. It uses sugar and yeast to make the tiny bit of CO2 we need for injecting into our aquariums. But, it is barely able to provide an adequate supply for a 10 gallon tank, so there is very little chance of getting too much with a bigger tank.

The pH drop that CO2 causes, because part of the CO2 goes to making carbonic acid in the water, does not affect either the fish or the plants. In fact pH is not an important variable for fish. In a fish only tank, no plants, the pH can be seen as an indicator that something else is wrong with the water, so an out of limits pH would be a bad thing. In a planted tank, with the plants consuming nitrates, phosphates, ammonia, and emitting oxygen, and CO2, at night, the pH varies according to what the mix of various compounds is in the water.

A high pH will usually mean a high KH, and high KH can be a problem for some fish, but the pH isn't. So, don't be concerned about the CO2 caused pH changes.

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