So my xenia is still a little miffed from Saturday's Model D 8% overdose. Everything else has bounced back. Anyone experience bubbles coming into the D's container through the outlet hole for several minutes upon filling and placing into the tank? It forces out a significant amount of H2O2 into the tank until the bubbles stop. I also notice that in any diagrams I see of the D it says 3% H2O2. Lasse and atoll have been graciously be offering their advice, my email to Sochting.... crickets. I'm scared to put the thing back into the tank ;Nailbiting