Those with check valves for your airline tubing, do you find the regular type work alright, or do you think the spring
check valves work better? I have no clue which one to get.
Also, does anyone have a picture of their sponge filter setup with tubing and gang valve? I need to see the scale reference and uh....I don't know how to set this up. I'm guessing the gang valve goes on the OUTSIDE of the tank?