It will probably be soil substrate with sand and maybe a few pebbles if that sounds ok?
And then. Lots of plants, of course!
Preferably fairly low maintenance ones.
I was thinking about getting a 72 litre tank, that's about as big a tank as I can fit on my desk. =')
I'm thinking of moving the current inhabitants of my 30 litre tank into it. (a betta, 4 cardinals & two unknown tetra) Adding a few more cardinals.. Some ottos.. is there room for much else, and if so any suggestions? =)
And then use the smaller tank for 1 or 2 dwarf puffers and some bumblebee gobies? & I'm not sure whether that's too small for ottos. Maybe a few ghost shrimp?
For the smaller tank I'd love some suggestions of low light plants, I've currently got a couple of swords which are doing ok.. and an anubias barteri (I think).
And then the other tank I will make sure I get one with a decent light! But since cardinals are not too fond of the light some plants with big shady leaves might be a good idea?
Also. The pH of the water in my current fish tank is about 8. (liquid test kit). ammonia, nitrite & nitrate are zero.