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I see that the ETH heater smallest connection for the heater is 1/2 in. I was wondering if there is a way to convert the connection for a smaller tube. My canister is 12/16 mm tubing size.

Dear Mr Mahaffey, please contact our Hydor Usa Inc at customercare.usa@hydor.com. We will be more than happy to help you.

I have had my unit for less than six months. I noticed bubbles accumulating in the diffuser so I took it a part to clean it according to the instructions. What I found was that the magnet had come off of the shaft and that the impeller was not turning enough to move any water through the diffuser. What is the process for a warranty repair/replacement? The unit has been very beneficial for my planted aquarium and I would like to get it up and running as soon as possible. Thank you for your consideration Ron Mahaffey 760-636-8496 rmahaffey1@dc.rr.com

Dear Customer, we thank you for your contact. Thanks to your inquiry, we have verified the instruction's texts and there is an error in the English translation. The right text should be: "Take the pressure reducer (N) and make sure that the regulation knob is closed (turn anti-clockwise) -Fig. 1-, then turn the pressure reducer upside-down and make sure that the o-ring is in the correct position and there are no particles or dust inside the connection or on the top of the cartridge. (M). Screw on the CO2 cartridge slowly..." This is an error relative only to the english translation: in fact the translation in the other languages is right. We guarantee we are already correcting the text, and we apologize for this inconvenience. In reference to the indications of turning the reducer upside-down, this is only for inspection that the o-ring is correctly positioned and there are no particles.We should have probably added a sentence indicating to turn back in an upright position the pressure reducer before screwing on the cartridge. Thank you again for informing us, we will update the English translation as soon as possible.

that should read plus to the left and minus to the right

Turns out instruction text was correct and Figure 1 is wrong. Here are the instructions: "Take the pressure reducer (N) and make sure that the regulation knob is closed (turn clockwise) -Fig. 1-", I thought when turning the valve counter clockwise as indicated in Fig 1 a spring controlled pin would be released such that CO2 would be blocked from escaping into the central well. Unfortunately it didn't and this time the CO2 escaped from a different pressure relief hole. You might say that clockwise is "righty tighty" is obviously closed but Fig 1, and the fact that a small plus sign to the left of the word Hydor and a minus to the left led to imagine minus meant closed and Fig 1 was correct and counterclockwise was the way to go. A further indication these instructions are screwed up is that next statement referencing the valve reads "Slowly turn clockwise the regulation knob on the pressure reducer checking that the CO2 reaches the bubbles counter, then proceed with the first regulation setting the desired amount of bubbles". Following the text instructions the valve is already in the completely clockwise position! Geese. Open/closed, plus/minus, clockwise/counterclockwise! I have a nice CO2 burn on my hand now.

Could I get an exploded diagram of this valve please?

Where can I get a replacement "o-ring" for this unit?

Pictures available here: http://fwaquarium.blogspot.com/

Well, I got the pressure relieved and unscrewed the valve so I see what was going on. It looks like there were two "o-rings" in the valve, two clear disks with a hole in the center. One of them looks shredded. Was the unit supposed to ship with both rings inserted? I screwed the cartridge on with hand strength only and I'm not a strong guy. Any thoughts out there?