I take it the water conditions (hardness) were fine for the Killies?plankton wrote: ↑Wed Nov 01, 2023 8:35 am Welcome to the forum.
Vallis will probably fill the tank, try something a bit smaller like saggitaria.
Be careful with sharp rock like dragonstone. Sand is the best substrate for most species.
I'm not sure about the amount of fish you want in what is basically a 15" cube.....I'd cut down on the number so there's only 12 fish in there with the shrimp.
As black ghost says, the killies won't want it too bright, you may need to look at floating plants, but don't choose duckweed - it's a nightmare!
Many thanks again