Welcome to the wonderful world of planted fish tanks.
Nitrites (with the "i") are highly toxic at very small levels, less than
I wouldnt recmmend adding any salt unless your treating for ich. Having salt present in a freshwater tank can harm the fish. You can remove the salt by
Least killies are pretty popular and are livebearers so they breed pretty quickly. You could raise those as food and sell them as well.
Do you they lay them singly or in clutches? Because this is a random clutch of six or so and they are see through with little orangish dots xD Not questioning