Aquarium CO2 Regulator with Solenoid 110V-Mini Dual Gauge Display Bubble Counter,Check Valve Fits Standard US Tanks-Accurate and Easy to Adjust (HP2000PSI,LP150PSI) Flow Meter

Good quality and Very practical，It's so great.First of all, I think the most important thing is that the installation is simple, just need to be screwed on. The pressure is stable under the working condition,came with a wrench for tightening the unit to the tank. No leaks so far. Solenoid is operating fine, , and there is no problem in the period after I bought it. Secondly, it is beautiful and compact. Does not take up a lot of space, and can be well integrated with my family's fish tank, becoming a new system.

Day 1: everything looked fine and is fine. Hooked up with a co2 320 adapter and works with a 88g threaded co2 tank. When i first plugged it in the solenoid made a loud humming sound. I thought it would go away within a few minutes based on other reviews. Went out to eat and came back a n hour later and the solenoid was still humming. Turns out I twisted the solenoid too tight; a simple twist and then the solenoid humming noise went away. Not sure if other people who complained of the noise just had the same issue as I did, but if the solenoid is loud then it's worth a try to loosen it a bit. As far as the temperature goes it does get hot but only if I leave my finger on the solenoid for a few seconds. For the price this is great. I just hope that the product lasts. I read another review saying their solenoid melted after a few months or weeks. But idk this is only day one and the thing seems to be working just fine. I have this hooked up to a fluval diffuser and aquatek co2 tubing.I don't know if it would be worth it getting a solenoid with cool touch. I just figure why would you be touching the thing unless you are changing the tubing? Just set it and let it be and if you are changing the tank then just don't be a dummy and let the thing cool down before touching it if it's too hot.Over all as of day one of use I am satisfied and will provide more feedback if I experience othe things. Better than spending $300-400 on a fluval branded regulator.If I experience major issues then I might consider the aquatek regulator. But until then this thing does the job for nearly half the price of aquatek, and nearly 400% of the price of fluval.I don't see a cool touch solenoid being worth the extra premium as of now. This product gives the name brands some competition.Days 2 and 3 of use: the bubble counter seems to evaporate the water in the bubble counter. Day 3 I've refilled the water in the bubble counter for the second time. This time I've attempted to tighten everything even tighter and fill the bubble counter till full. Hope this doesn't become a regular thing.Maybe a check valve will help with this issue. If day 4 has evaporation I will try th e check valve. As I'm looking at bubble counter right now I'm already seeing condensation form in the bubble counter. Perhaps this heat is occurring from the solenoid being hot? Will update...Week 2 to 3ish: tilting the 88g co2 tank sideways prevents evaporation from the check valve. Seems this check valve was designed to be upright not sideways. See picture. So far since I've done this I haven't had to add more water to the check valve. Seems like this just takes some tweaking. Although it isn't recommended to tank the co2 tank sideways due to leaking concerns I haven't had any leaking issues this far. I guess this is because I'm using a small and cheap co2 tank. Changed the four star to a five star review.

I've had this regulator since may 2019, it looks gold like the one pictured but mine doesn't have the doublesun logo on it, anyway it worked fine for awhile then as of Sept 2nd 2019 the gauges quit working. I have it on a 5lb tank which last me almost a year and I just filled it, so I know there is co2 in it. I took it off and even opened my tank a little to see if there was co2 left. I reinstalled it and still no guages also seems that the valve wont let me open it no mor then 1 bubble per 5 seconds. Edit./ the company emailed me I believe her name was joyce and they sent me out a new one right away I am upgrading my reveiw since the customer service was great... thanks again

Update: now the gauges don't work. After 3 months, it also has stopped putting out anything. I hear the motor but nothing comes out. UGH.Original: The gauges work fine. But the solenoid is SO SERIOUSLY LOUD! I can hear it across the house. It vibrates and buzzes terribly. Also, the bubble counter ended up pushing most the water up the tubing. So it's almost useless. Not sure what happened there. Not sure if I'll return or not since the solenoid on most make some noise, but jeez this one is LOUD.

To start I was unhappy with the product at first because I thought there was a leak. It was user error, my bad. Make sure you read the instructions. The regulator is a quality product and I recommend to anybody looking for a reliable product. Does get warmer than room temperature but it seems normal. Adjustment needle is pinpoint accurate at first so don’t mess with it too much, it gets kind of loose or it could just be me. I use a 10lb bottle of food grade co2. Works great. A+

This valve works great! I have had it running for a month now and it is flawless..... I dont understand why the other reviews said it gets hot. It is cool to the touch. Very easy to dial in and very consistent. And NO im not affiliated with this company.... (Wish I was though). I run mine on a timer 8 hours a day and it is actually cool to the touch. No leaks, no heat and no problems.... Just great.

I would not buy it again. It seams poor quality even though appearance suggests otherwise. There were several issues I had to deal with on arrival. I found that this regulator may leak in many places so you need to seal all threads where leaks are found. In my case it was leak in output valve thread. The rubber gasket was torn. I had to replace the gasket and additionally seal the thread with plumbing paste.Other than leaks issue I had a problem with pressure stabilizing. It did not provide advertised 45-50psi. In my case it was too low (~20psi) so the bubble diffuser could not really work. Fully open needle knob did not make any difference either. Even though the regulator has output pressure preset by design I had managed to increase it to required stable ~40psi. However, I don't want to advertise my solution here as it might be dangerous for non-technical people.If I ever need to buy such pressure regulator again I will go with the one which has output pressure adjusting knob. This way I can set the output pressure as I need.

Plants pearl and are loving life. Price is amazing and is the reason for the 5 stars. My only complaint is that the bubble counter only lasts about a week before it evaporates, any position ive put it in. Thankfully its pretty set it and forget it.I use this for my 50gal tank and I have it setup to a Wifi plug as the timer.

just what i needed

Works as expected but gauges are very small and item has a cheap feel to it. It's not all brass.

Selnoid never opened. Returned it.