Planaria...fwe not working

[sytanek]

Okay I have planaria in my 55g. They are all about 1mm, and have seen one or two that were at max 1cm. I can not kill them all. Flatworm exit never kills every one, there is always one or two left on the glass I can see after dosing, which means theres still some in the rocks.

I have dosed 5 times now, each time a bit stronger. Yesterday I dosed 2x the needed amount and there was still 2 small ones that never died. Argh. Any suggestions?

 

[amike5]

I wouldn't dose anymore for at least a year, you may give them immunity to the chemical.

 

[sytanek]

anyone else?