My water paramaters are 0ppm NH4 0ppm NO2 10ppm NO3 and have been stable for a while now. Tank is moderatly planted, with 1 betta, 3 peppered corydoras, & 1 sterbai cory. There's also a bunch of snails now lol.. I need more cory's because my betta keeps going for their food, when I had more corys it wasn't so easy for him.
Would it be safe to add 2 without overloading the biofilter?
Then eventually another 2? This might be pushing it..