Hi, I have a 20 liter (5 g) tank, that I was told was a 40 liter (10 g) and never thought to check, until a few months ago my brain clicked that when I do a gravel clean and big water change I was filling a 10 liter bucket and half emptying my tank.
I've had my 'mini' tank for about 1 1/2 years. It had 2 guppy's until I lost 1 a few months ago
and 5 black neon tetra's (don't think I'd have got the neon's if i had bothered to check the tank size or engage my brain)
Anyway I have just bought a 140 L tank (37 gallons) which I have been trying to cycle . . .
I'm no good a plants but I'm working on this.
Can't wait for new fish!!!!!