DO NOT TRY THIS UNLESS YOU ARE EXPERIENCED
I have proven that there is no need to water change ever again - that's right, EVER AGAIN!
How? Simple -
Anyone on this forum who knows me, knows that the tank I have has no filtration, no lighting except for aeration provided by a few air stones to produce the much needed oxygen and a heater...all else is natural rock/stone, wood and live plants with naturally grown cladophora (algae). This is the tank set-up.
I use absolutely no chemicals in the tank. I have 40 fish in the tank. I test every Sunday for ammonia, nitrite and nitrate. I test for temperature every day. There is direct sunlight on one half of the tank. I fed Monday, Wednesday, Friday and Saturday (human food and frozen bloodworms and shrimp).
Topped off the tank one or two days per week with a gallon or so of tap water.
This is the tank set-up.
October 16, 2011 was the last time I water changed. The chemicals, ammonia, nitrite and nitrate remained steady (ammonia: 0; nitrite 0; nitrate 40). On December 4, 2011 the ammonia level rose to 1.5 ppm, nitrite to 0.25 ppm and nitrate to 60 ppm.
I asked myself, should I water change or can I approach this in another way...........naturally.
I did not feed the fish in the tank (from Sunday, December 4, 2011 to December 11, 2011 Sunday); the fish were not lethargic, as playful as ever...and the liquid water test on December 11, 2011 revealed: ammonia 0; nitrite: 0; nitrate 40.
Yes, the fish get to eat on Monday (((smiles)))
Again, I have proven the fish industry is a huge hoax. The "experts" are more stupid than ever. It's all about the chemicals and the regulation thereof.