How do I properly open/close the CO2/pH permanent test diffuser?
To open the CO2/pH permanent test diffuser (angled model with black stand) just pull at the transparent cover with a sharp tug. The lid fits very tightly to prevent the diffuser liquid from leaking into the aquarium. To easily close the CO2/pH permanent test 2 diffuser (round model with white back) we recommend lubricating the seals with JBL SiliconeSpray. It is advisable to attach the lid in a tilted position and to press firmly against the bottom for 3-5 seconds to make sure that the rubber seal slips inside. Otherwise you can repeatedly press in “pumping strokes”. This ensures that the seal does not slip off and the diffuser liquid does not escape into the aquarium.
Both instructions apply to all batches manufactured until 10/2016. Subsequent models are provided with a modification which reduces the described effect if problems occur.