Copper Keeps Dropping

[tkoenig88]

I have some fish in a QT tank and I’ve been using copper power for the tank. All that is in the tank is a few pvc pieces for hides for the fish and a foam block for the filter. The copper levels keep dropping overnight. Last night the level was at 2 ppm and this morning it was at 1.09. I’m using the Hana high range checker. I didn’t think I’d have to keep redosing with nothing to absorb the copper. I can’t imagine the foam block is absorbing copper. I suppose it’s possible the pvc is but I wouldn’t think so. Also if I dose like .5ml of copper and then test it shows the levels back up closer to 2 again. Seems like a small amount to raise that much. Fish all seem ok and no signs of the velvet I’m dealing with just need to know if anyone has similar experience or thoughts.

 

[tkoenig88]

Any help is appreciated

 

[Gill the 3rd]

Something must be absorbing it, it doesn't just disappear. What foam block are you using? My copper qt tank was a 75 gallon with a few air powered sponge filters and a lot of pvc fittings. I got my copper level to 2.0 ppm (copper power) and it never budged from there. You're using the correct test kit so that shouldn't be the issue.

 

[tkoenig88]

Something must be absorbing it, it doesn't just disappear. What foam block are you using? My copper qt tank was a 75 gallon with a few air powered sponge filters and a lot of pvc fittings. I got my copper level to 2.0 ppm (copper power) and it never budged from there. You're using the correct test kit so that shouldn't be the issue.

It’s a foam block from a fluval flex tank. I suppose it could be absorbing the copper. I could just replace it with filter floss to catch debris. Filter floss def shouldn’t absorb anything