I'm in agreement with others here. I would let the tank run (no fish) for a good week. You can do a few water changes, half the tank volume, without using conditioner (since there are no fish), maybe alternate days. Keep the light on for the plants as usual. Run your ammonia, nitrite and nitrate tests prior to a water change, once or twice, and certainly at the end of the week. Keep us posted on test results; you have ammonia in the tap water, and I would be interested to see how this plays out. Always test prior, not after, a water change as this lets you see what is occurring in the tank on its own. At the end of the week you should be ready to add the first fish you intend.
And on the fish, I think a 10g is small space for all these. Do we have the GH and pH of the tap water yet? A 10g is best suited to what we call the "nano" type fish, but many of these have quite specific water needs so it is wise to know the parameters. Tetra prefer soft water, guppies harder, though this is very general and depends upon the species. If the catfish are corys, I would aim for five. The "dwarf" species mentioned are rather sensitive, in my experience, and probably not the best choice here. But they would not attain over an inch anyway, so presumably the "dwarf" mentioned by the store is something else. What tetras were you thinking of?
Byron.
And on the fish, I think a 10g is small space for all these. Do we have the GH and pH of the tap water yet? A 10g is best suited to what we call the "nano" type fish, but many of these have quite specific water needs so it is wise to know the parameters. Tetra prefer soft water, guppies harder, though this is very general and depends upon the species. If the catfish are corys, I would aim for five. The "dwarf" species mentioned are rather sensitive, in my experience, and probably not the best choice here. But they would not attain over an inch anyway, so presumably the "dwarf" mentioned by the store is something else. What tetras were you thinking of?
Byron.