Guides
The questions that need more than a number. Each of these is worked through properly and checked against the same engine that scores your own tank.
How many fish fit in your aquarium? The honest answer
Why the inch-per-gallon rule is wrong, what actually limits a tank, and four worked stockings that score green.
How to tell males from females
Thirteen methods, each drawn, each rated for how much it is worth in your group — and honest about the age before which you cannot tell.
Betta tank mates by tank size — engine-checked
What can genuinely share a tank with a betta at 19, 54, 112 and 240 litres, with the reason for every rejection.
Looking for species rather than reading? Start from a list.