It looks like the system grows the nitrifiying bacteria that removes nitrate.
From what I understand those particular bacteria are extremely hard to maintain.
Even if it does work. The fish will use up electrolytes and other trace elements in the water that will need to be replace. Also as the water evaporates the dissolved solids stay behind making the water harder and harder with each water top of. If you don't change the water this becomes a very serious problem over time.
Bottom line is no matter what you do you will always need to change the water in your tank. |