- Joined
- Sep 5, 2014
- Messages
- 66,541
- Reaction score
- 62,834
My skimmer is running at night. Outside air is still added to the skimmer
Its been ~30 years since my chemistry days in college.. but if all of the O2 was depleted in the system the skimmer would be less efficient, fewer bubbles would be produced, and eventually, a vacuum would be formed due to the missing the oxygen...
but again... it's not a sealed system.. Outside air is used. The skimmer is working exactly the same as before (same skimmate produced, same bubble levels, same power consmption.. etc)
Unless you can show that a skimmer uses 100% of the air sucked into the venturi I don't think I have anything to worry about. If anything my skimmer is adding more PURE O2 into the tank than before at night.
Those statements are not correct. CO2 can be entirely stripped from low O2 air and the air can still be low in O2. CO2 is a very minor component of air. Most of it is N2. People mistakenly think O2 and CO2 always move in opposite directions. Not true. Both can be high, both can be low, or any combination of high and low.
Perhaps an analogy is useful. Say you are in a room with only 95% of the normal amount of O2 in it. If you remove a book from the room, the total O2 will rise if normal air replaces its volume, but the air is still deficient in O2. Maybe it is now 95.1% of normal.
No one is claiming the O2 is all gone. 95% of normal is undesirable (IMO).