activity:water-depth
activity:water-depth


Author Comment Last activity Moderation
danbeavers "Go here to see the results from experimentation. " | Read more » over 6 years ago
danbeavers "The screw valve should BE a needle valve. I suggest a needle valve so that there is a large range of flow control. Most other valves are mainly o..." | Read more » almost 8 years ago
eustatic "huh. i think i can make this out of the air filter parts? how essential is the 'needle valve' versus the screw valve that comes with the aquarium..." | Read more » almost 8 years ago