Hi ,I have treated myself to one of these as i wanted to get myself a pressurised co2 system. I have a Juwel rio 240 tank, which is filtered using an Eheim 2026 external filter, and i have an Arcadia ot2 luminaire 4x54w providing lighting.The substrate is fine 1-3mm dorset pea. It arrived this morning and i have it installed i have calibrated the probe and done as the book says but no co2 is coming through and my ph is reading 8.5. I dont want to have to get rid of the ph controller if possible and would like some help in what to do, the controller is flashing, the instruction manual is double dutch to me!!! Will it start putting co2 into the tank when my ph levels drop to nearer 7? Any help would be very much appreciated. Thanks in advance Linda.