I'm a bit confused by the different types of ADA Aqua soils, I want a decent substrate for my 20 litre Arcadia Arc and worked out that I'll need 3.5 litres, so thought that a 3 litre bag of the ADA soil would be ideal (the tank is 30 x 20 x 30)
I'm thinking I'd need to go for Africana as my Ph...