I tried "search" at the top...but so many things came up :-? :-?
Just trying to see if I'm starting to understand what these things do, all corrections...further explainations, info...HELP...would be appreciated!!! Okay, here goes :-? :-?
1) filters:
-internal & external
-all contain some kind of filter media such as sponges, carbon, polyfibers, noodles....?
-some media is used to filter out "bad"...bacteria, waste....?
-some media (bio?) holds the good bacteria
-all? cause water movement helps create more oxygen
-are a necessity for all tanks
2) air pumps
-connect to tubing
-air goes through tubing to airstone, ornament, bubble wall...?
- the air causes movement resulting in more oxygen
-not a necessity
3) power heads (really can't get my head (lousy pun) around this one)
-causes water movement??????
-not for freshwater tanks????
4) air control valves (see these at store, when asked what they were for, they told me just to hold multiple tubes)
-holds tubing from air pumps?
-you can control the amount of air going through the tubing????