I just plumbed by CO2 back in and the indicator shows no change although its been running for 3 days and at a higher rate than Ive ever had it.
I've always had trouble with it though, seems I need alot of gas to get close.
Surface agitation is almost nill, just a slow swirl. No airstones.
I think this is a chemistry lesson to be learnt here. Somethings pinching it
I have noticed a large amount of bubbles collecting in the gravel substrate but I'm unable to determine if this is chemical or the injection. I have an inline diffuser which is flat out and a few small bubbles are being exhausted into the tank. Some of these my be grouping in the gravel.
The reason I say a chemistry lesson, I've got a GH at 240ppm and KH at 210ppm. The way I understand it is KH acts as a buffer (mines large) by injecting CO2 I'm effectively attempting to lower the PH to which the KH is resisting? Currently my best measurement of PH is 7.5 (wide band kit
Tank is 140L [31g(UK)], Eheim external with inline diffuser. Soleniod controlled 30Kg CO2 active for 9 hours per day. Medium planted, medium stocked. 96W T5HO. 5mm gravel
My brain hurts slightly as the more I read the more things 'appear' to contradict themselves.