wooden_reefer
New member
My test requires 15 min, IIRC. I've also had fish stop eating and die from copper. I'm not saying one should never use copper, just pointing out that there is no 'perfect' treatment. If there was, these threads would be a lot shorter! :frog:
I use straight copper.
I add about every other day and test every six days or so.
If it gets above .4 ppm, it will be for a very brief period.
I have not had a single problem with this method for over 30 years.
At first I tested copper every time I added, but after so many tests it has become very predicatable, and slight overdose for a few hours does no harm, empirically spoken.
one minute work and then 5 minutes work every third time.