05-01-2013, 04:32 PM
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Originally Posted by Eldamo
The bigger water volume is an eye opener for me. It is logical but, with all the other information I'm learning it didn't occur to me - it's been good to hear the advice from the community and making me feel welcome.
As the weeks go by I'll be asking more questions on the plants, especially CO2 as I'm not sure if it's needed for my low tech tank. I'll monitor my plants and see how they do with the liquid CO2 for now.
CO2 occurs naturally in the tank, mainly from the breakdown of organics by bacteria in the substrate, but CO2 also occurs via the respiration of fish, plants and bacteria of course. A natural or low-tech planted tank uses this natural CO2, and balances light and other nutrients with it. It can take a bit of experimenting to find the balance, but it is not difficult.
I am not a fan of liquid carbon supplements like Excel or CO2 Booster. These contain a toxic chemical called glutaraldehyde which is used in hospitals to disinfect surgical instruments, in anti-freeze, in embalming fluid... you get the idea. It kills bacteria, and according to the product safety sheet is toxic to humans if splashed on your skin or the fumes are inhaled. It will kill some plants outright; if overdosed, it can kill plants, fish and bacteria.
Back to the water changes, this article I prepared may help to explain their importance: http://www.tropicalfishkeeping.com/f...hanges-117205/