Smaller tanks can be a little more time consuming because the water specs change faster than they do in bigger tanks. With the right equipment though, anything is possible.
Lighting is key for a planted tank... save up for something you'll be happy with. The Nutrafin CO2 system isn't all that expensive, and you could always set up a DIY system that would perform just as well. 20 gallons is the biggest tank I would use a DIY CO2 system on, though... the most I can get is 10ppm CO2 out of it.
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20gal tall! The display tank.
Flourite substrate, Nutrafin CO2 system, Aquaclear 50, 55W 6.5k bulb @ 10hrs, 65W 10k bulb @ 2hrs, 100W Visi-Therm
4 furcata rainbows (and 8 fry!), 1 albino longfin bristlenose pleco, 6 crystal red shrimp, ramshorn & physa snails
5gal hex! Mini planted tank
Eclipse Hex5 with Eco-Complete substrate, 25W heater, 1 male crowntail betta, some ramshorn and physa snails.
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