| Using ORP meter
I started using a YSI Ecosense ORP pen meter last night.
1st use about 90 minutes after feeding I got a cess pool reading of 180-190. It was quite a shock as I never get ammonia, or nitrite readings. I've never had health issues since I started up in spring 2006. I have not turned on the UV this spring as the water is clear and after 2 SP treatments covering ~50% of the pond each time the winter algae was knocked back and I have a light fuzz the koi maintain.
This morning the reading was 302 -304 before I fed. Are swings of this magniture possible in 10 hrs?
Another thing, sometimes the meter drifts slowly dropping a few points at a time. Other times it locks right, like in the solution and in tap water. This AM it locked on quick. Is it normal to have to wait for the meter to settle in order to obtain a reading at times? |