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💨 Effortless CO2 control that keeps your aquarium—and your peace of mind—flowing smoothly.
The BCS100S is a durable, easy-to-install CO2 bubble counter with an integrated mini solenoid valve and high-quality check valve. Designed for planted aquariums, it features metal screw connections, a transparent pressure-resistant PC cylinder, and ultra-quiet, low-power operation. Compatible with most CO2 needle valves, it supports timer automation and ensures precise CO2 flow monitoring to maintain a healthy aquatic environment.














| ASIN | B08YN8JW3V |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #44,814 in Pet Supplies ( See Top 100 in Pet Supplies ) #165 in Aquarium Air Pump Accessories |
| Color | Screw connection with Bubble Counter |
| Customer Reviews | 4.1 4.1 out of 5 stars (171) |
| Date First Available | March 11, 2021 |
| Item Package Quantity | 1 |
| Item Weight | 5.9 ounces |
| Manufacturer | Clscea |
| Package Dimensions | 4.65 x 4.25 x 1.85 inches |
| Special Features | Durable, Easy to Use |
J**Y
Great value
I purchased this for my co2 kit that is another brand. That solenoid kept failing after multiple replacements. Now this has been working for months now with no issues except occasional bubble bleed for about an hour after shutoff and I will not the plug where the power supply connects seems a bit fragile. That being said I highly recommend. You cannot deal it at this price.
W**O
Late review
I used it for my 1 L Co2 generator. Now it works really well for that tiny thing. Anybody who wants to use it dont forget the valve. Recently the valve broke and water went back to the generator and broke the solenoid.. Still works tho but i need to get a new clear tube and its attachment. Hassle but it is what it is.
T**N
DO NOT BUY
I would give this zero stars if I could. The solenoid is INCREDIBLY fragile, and while I was doing my first change, my hand slightly bumped up against it and parts fell everywhere, and were incredibly hard to find and put back together (especially the staple looking thing). This is the only review I have ever written simply because I felt I had to go out of my way to warn others about how terrible and ineffective this product is, clearly dropshipped as well which I don't usually mind if there is decent QC. I cannot stress this enough, please spend your hard earned money elsewhere.
A**R
Cool to the touch, works, good instructions
I bought this to replace an FZONE solenoid that ran too hot for my desktop CO2 system. This Clscea solenoid is warm to the touch when running, but does not heat up my bubble counter or regulator as the FZONE one did. I like that the instructions include maintenance how-to. I am using it with pressurized CO2, the hygger system with 45g canisters. I don't know how it will perform with yeast CO2 or reactors (humidity).
A**R
Love it
Yes, it’s compatible with the MagTool DIY kit you can buy on Amazon. I was nervous for whatever reason it wouldn’t fit, but the quality/design outcompetes the one that comes with the kit 100%. It fit perfectly onto my 2.5L tank. Lifesaver after the original broke.
R**N
Breaks off all the time
Solenoid breaks off all the time Thus is the 4th one I ordered and the first three the solenoid is very fragile and just the smallest bump on this thing….it breaks off., otherwise it works. P
T**N
Co2 restored!
Seems like the bubble counter is better quality then the original one that comes with the Amazon co2 generator I would give it 5 stars but still has the crappy solenoid that can fall off in a bunch of pieces if bumped just be careful when removing and handling and should be fine
P**R
Great replacement for DIY kits
I bought a diy c02 kit from amazon and the bubble counter/solenoid it came with was absolute junk. The bubble counter leaked when I turned on the c02 and then when I tried to tighten it, the solenoid broke off. Bought this as a replacement and it has been working great for the past month. Definitely can tell its a bit better quality vs the included stuff from diy kits.
M**E
Love it
Great bubble counter, can really dial in fine adjustment
M**M
Funciona perfecto
No esperaba mucho, pero la verdad ha funcionado muy bien. Tenía miedo de que lo que quedara a mi tanque de Co2 casero por que es de diferente marca, pero le quedó perfecto.
K**B
great
Does what it says. BE SHURE TO get a pin valve to control the bubble rate.
Trustpilot
3 weeks ago
2 months ago