Understanding Air Stones/pumps 101 (noob)

I've got a 75 gallon tank with an oscar fish, at the moment I have 1 air stone and 1 air filter inside the tank. The air pumps are both 10 gallons, does this mean I have enough air for 20 gallons total? I'm looking to add more air into my tank, I feel like my boy needs more oxygen. If I have say 8 10 gallon air pumps does this equal to 80 gallons of air? Or does it have to do with the watts of the air pump?

Thanks for the help, do you also recommend an air stone or possible air wall? I'm using this turtle one from petsmart at the moment.

 

With air pumps you will want to look at the cfm of it since that's the output. Watts can be misleading due to efficiency of the pump.

 

That is the rated capicity because with a larger tank there is air more pressure and backflow on the air pump

 

That is the rated capicity because with a larger tank there is air more pressure and backflow on the air pump

That's what I was thinking, it wouldn't make sense for the pump to say 10 gallons but itll be great in a 75 lol

 

That is the rated capicity because with a larger tank there is air more pressure and backflow on the air pump

I believe the rated capacity is just so new people can ball park their pump.
A 20 Extra high/tall tank will have ~2x the pressure of a 20 Long (The XH or XT 20 will have the same pressure as a normal 125 gal, ~24" of water on top of the stone) when the stone is at the bottom, both are 20s though. Common tank measurements. Aquarium Sizes

I do not worry about this as I like just dropping my stones into the HOBs so they do not have much water above them. I also like overkill when it comes to my air pumps (so whisper 100gal pumps on everything but the 7.5gal which runs a 20 gal(?) air pump). Air pump rating goes up WAY faster than their prices do.

 

I believe the rated capacity is just so new people can ball park their filter.
A 20 Extra high/tall tank will have ~2x the back pressure of a 20 Long (The XH or XT 20 will have the same back pressure as a normal 60 gal, ~24" of water on top of the stone) when the stone is at the bottom, both are 20s though.

I do not worry about this as I like just dropping my stones into the HOBs so they do not have much water above them. I also like overkill when it comes to my air pumps.

I got have 1 tank with a HOB the other 2 are canister filters. Moving the stones up towards the top will work better then having them near the bottom? Or did I not understand your comment lol

 

Yeah, I like to put in the HOB because there is not that much water pushing down on it. I do also like to put them in tanks so fish can play in the bubble flow. You cannot over saturate you tank under normal conditions as far as I know.
Now If I drew vacuum on water and then charged it with an O2 cylinder I'm not sure what would happen to fish in that water?