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post #1 of 8 Old 03-14-2009, 07:43 AM Thread Starter
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air pump

how critical is it to have an air pump that matches your aquarium size? i just received a 55 gallon aquarium from a friend and i noticed he had a 20 gallon air pump for the 55 gallon aquarium. besides it not being the "correct" size, what would be the issue with using the 20 gallon pump?
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post #2 of 8 Old 03-14-2009, 09:14 AM
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None. You don't even have to have an airstone unless you are keeping fish that need oxygen-rich water, or maybe if you have an overstocked tank.
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post #3 of 8 Old 03-14-2009, 09:34 AM
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The size of gallons on the air pump doesn't have to match the size of your tank. I have a pump rated for 10 gallons in my 29 gallon tank and a 60 gallon pump in my 125 gallon. You should see on the box of the air pump how deep it can be placed in the tank and how many air devices it can operate at that depth. I.e. at a 24" depth my Rena Air can operate 1 air device but it could operate 2 at 18" or up to 4 at only 12". That's the real issue because if it's too deep it might not be able to push out the air.

125 gallon tank:
2 Tiger oscars, 1 Electric blue jack dempsey, 1 Jack dempsey, 2 Bala sharks, 1 Firemouth, 1 Salvini, 1 Texas cichlid, 1 Pleco; All juveniles

29 gallon (in the works):
1 Blue ram, 1 Cockatoo cichlid, 1 Powder blue dwarf gourami, 1 Bolivian Ram, 8 Neon tetras, 4 Corydoras, 2 Bamboo shrimp, some ghost shrimp
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post #4 of 8 Old 03-14-2009, 09:38 AM
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I forgot to say that as long as it's pumping out air it should be fine.
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post #5 of 8 Old 03-14-2009, 03:00 PM
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No problems, I do not have an air pump on my 55...

55 Gallon

-10x Zebra Danio
-3x Angelfish
-5x Velvet Red Swordtail
-3x Albino Cory Cat
-3x Clown Loach
-3x Black Mollie
-1x Red Tailed Shark
-1x General Pleco
-1x Snail

10 Gallon

Quarantine

37 Gallon (Wanted)

Not Sure

150 Gallon (Wanted)

-5x Bala Shark
-2x Neon Blue Goarami
-5x Clown Loach
-1x Black Knife Ghost
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post #6 of 8 Old 03-14-2009, 03:07 PM
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be sure to include a check valve. theyre cheap but a great thing to have. if the pump fails/power fails the air line wont create a siphon ruining the pump, inside the stand and so forth.
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post #7 of 8 Old 03-14-2009, 03:19 PM
It really depends on volume of water and depth of air stone in the tank and type of air stone.
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post #8 of 8 Old 03-14-2009, 03:37 PM
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I am running a 20 gal pump in both of my 55 gal tanks that have 2 air stones each and everything runs perfect.
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