Bubble counter and check valve recommendation

Geo's reef has a good check valve. As far a bubble counter goes, the only ones I've seen are the ones on ebay. I don't think there are much to them. I use a John guest check valve I got off amazon.

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Aquarium Plants black box. I hate bubble counters and the AP box works perfectly. Mine is 7 years old now and not a single hiccup. What regulator are you going with?
 
Aquarium Plants black box. I hate bubble counters and the AP box works perfectly. Mine is 7 years old now and not a single hiccup. What regulator are you going with?
It's a Harris dual stage from eBay. The black box is a regulator, isn't it?
 
You can get the add on box. They work really well!

Any bubble counter should work though. Do you have a good needle valve?
 
I have a nice hoke micromite needle valve and a solenoid that works with the calcium reactor, so the black box won't work for me, unfortunately.

I keep reading reviews for bubble counters that leak or the check valve doesn't work. They just all seem like junk.
 
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