martiyou;3086044; said:You need to clean the tank more often, if there is gravel, syphon it, clean sponges etc.. waste / dirty water equals white worms thats all there is to it. Reduce Bio Load or do more frequent water changes or better yet, DO BOTH.
mrfeddown;3086050; said:As said above, Planaria appear when there is too much food and too much waste. I realize you don't want to talk about your stocking issues, but you might want to think about how much waste you're producing in regards to your filtration, tank size, etc.
For now, clean your tank thoroughly with a gravel vac, do a water change, and look at increasing your filtration.
On another note, I just want to say I appreciate the effort you're putting into using English. I know it can be difficult, I did the same thing with Spanish and German. Kudos
WKUK;4201486; said:Josh m8, Investigate a sump using canister filtration is a real pain in the backside with big tanks. Bigger the sump the more water you hold so think of a 3.5x1x1. I ran a 4x2x2 on this for around a year on a overstocked tank and I did water changes only every 2 weeks in winter and weekly in summer. I have now upgraded it to a 4x2x1, So from a 450lt tank I added another 230lt to t that s almost 700lts of water. You would be able to move from a 340lt tank to 563lt. And if the pro can work that out for you that will increase your chances of loosing the white worms with reducing the waste and making the biological nature of the sump do its work. The more you clean those canister type filters the less chance the biological breakdown can happen.
I hope that helped