Thanks for the reply! Do you have any ideas for a system that will work in my case?
What do you know about the product Biozyme?
How much water can I replace without harming the balance? (assuming that it does ever become balanced)
As far as bacteria starters, the common is Bio-spyra. It's supposed to be really good. Other bacteria starters are not typical bacteria found in water, therefore, in order to keep the colony going, you must keep adding the bacteria starter for each water change. It can get expensive. The natural benificial bacteria thrive and multiply as long as there is sufficient surface area to colonize, water, oxygen, and food (waste).
In order for you to know that your water is properly established, you must...
1. Provide the bacteria. This can be obtained from a filter, sponge, substrate, or any type of material found in an already established tank (running for several months)
2. Provide oxygenated water. Using a powerhead or filter can provide this.
3. Provide food. I'm assuming the lizard will provide this.
Once the above has been provided, you should frequently check the ammonia, nitrite, and nitrate levels. When a tank first establishes, waste will break down and produce ammonia. Using a test kit will show any level above 0. The bacteria will start to multiply and feed on the ammonia. The amount of benificial bacteria will depend on how much waste is produced. The benificial bacteria will take in the ammonia and then produce nitrites. Sometime later, either a day or 2, the ammonia levels will go down, but the nitrite levels will increase. Other types of bacteria will feed on the nitrites and then produce nitrates. Ammonia and nitrite levels will go down and the nitrite level will increase. Unfortunately, this cycle will continue, increasing/decreasing the ammonia and nitrite levels. When it finally balances out is when the ammonia and nitrite levels are at 0 and the nitrates are anywhere above 0. Using a test kit frequently can help you with this.
Keep in mind, some water supplies contain chlorine/chloramine in the water. Chlorine will kill the bacteria. Therefore, I would recommend using a dechlorinator when adding water, IF your water supply does contain chlorine/chloramine.
With you having a lizard, I'm not sure if the above is worth your while. Fish are more sensitive to the levels in the water, since they eat, crap, sleep, etc. in the water. Your lizard may not be effected by levels of ammonia or nitrites since it just may bathe in it.
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Low Tech (1.5wpg PC for 10 hours, no CO2/ferts, gravel substrate), Equipment (72" Coralife PC, Eheim Pro II 2128 w/built in heater, FilStar XP3 w/Hydor ETH201 inline heater), Fish (6*Discus, 2*Angel, 5*Clown loaches, 4*L-018 Gold Nugget pleco, 1*L-260 Queen Arabesque pleco, 7*Cories, Farlowella cat)