How large a tank and how heavily stocked? What are your water parameters? I do 50% (or more) weekly depending on the tank. The goldfish get the biggest water changes as did the Discus when I had them.
Thanks, TNC lite.Which TNC product do you use, Complete (which contains nitrogen and phosphorus) or Lite (which contains neither)?
I was doing 50% water changes but went back to my usual 25% once a weekI'll come in to the original point in the thread. I would never use test kits to decide on water changes. I just do them.
There is more to water than what the test kits tell us. Just do somewhere between 25 and 50% as often as you can - ideally at least 3 or 4 times a month. It takes the time for one good dog walk, and it does wonders for the health of the fish, especially in a newly set up system.
I have been doing the same, and although it's still there, it's definitely not as bad as it was, maybe it's getting the message.Oddly, my chronic blackbeard that I had in three tanks has begun to die off, finally, after 2 years. I decided to be aggressive about manually removing it and it seems to have decided to leave town. In the one tank where I wasn't physically attacking it, it is happy, but it won't be unbothered for long. It took about ten water changes with removal via razor blade and suctioning up of loose pieces to get it retreating. I was obliged to cut some stem plants right down.