Here's a picture of the refill cartridge:
It looks pretty similar to standard 88g air gun cartridges like these:
The Fluval one costs £14 (so it'll be around $20USD) whereas the air gun cartridges are only $15 for 2.
For a sub-10 gallon tank, how long do you guys think each cartridge will last?
Quote:
Originally Posted by ozanter
I wonder how good the needle valve is.
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Good question.