Review on 🐠 Silicone Black Flexible Airline Tubing for Aquariums, Terrariums, and Hydroponics - Deep Jungle 3/16" I.D. 1/4" O.D. by Linda Wiley

Also, it looks great on the black background of my tank. It instantly merges and disappears. The downside is that this pipe is quite fluffy and will blow out of a standard CO2 system and standard glass diffuser at 40-50psi working pressure. I used small zip ties to solve this problem by attaching them just below the cone lip. Just to be clear, it wasn't just the diffuser that blew the whistle. Every connection including a non-return valve (on both sides) was available. I still give 4 stars because of the look and usability. The use of small zip ties doesn't bother me, but I wanted you to know about it in case it bothers you.