You might consider adding some bubblers to your tank. You can set up a very basic system with a small air pump and some tubing. If you don't want the air to look like it's coming directly from under the rocks - you can get ships, treasure chests, or things along those lines to connect the air tube to.
yes, they will live 2-3 years in tank like that.
Guppies, Mollies, Platys and Danios are all good friendly small colourful fish. tom. ----
Long wheelbase: front tank = 19.0 gal. rear tank = 18.2 gal. total = 37.2 gal. Short wheelbase: front tank = 16.5 gal. rear tank = 18.2 gal. total = 34.7 gal.
The gas tank on the 2010 Jaguar XF holds 18.4 gal..
16 gal's small tank 20 gal's big tank
The gas tank on the 2010 Suzuki SX4 holds 13.2 gal..
The gas tank on the 2012 RAM 2500 holds 35.0 gal..
The gas tank on the 2014 Mazda MAZDA2 holds 11.3 gal..
The gas tank on the 2007 Lincoln MKZ holds 17.5 gal..
The gas tank on the 2008 Suzuki SX4 holds 13.2 gal..
The gas tank on the 2011 RAM 2500 holds 35.0 gal..
The gas tank on the 2009 Mercedes-Benz GL-Class holds 26.4 gal..