Stocking advice needed

[FishObsessed]

I have a 38 gallon aquarium and wondered if 3 marble angelfish and 6 GloFish tetras (I know, but I like them) would be overstocking it? And will both these fish be ok with soft acidic water: 6.2 ph...6.5 if I add api ph. Gh is 15-30 ppm if I use a Wonder Shell, and almost 0Gh without one. Kh is 40-80ppm thanks to the api ph adjuster. 

Thanks for any input

Edited September 12, 2020 by FishObsessed

[Chandra]

With your tank size, those fish are okay. Don't chase pH too much. Add crushed coral to your substrate to maintain pH drops. I really don't recommend pH and kH adjusters from API. Instead if you have really really soft water, you can use seachem equilibrium to harden water based on the species you have. Wonder shells are great too but they are costly I feel. 

[Ben Ellison]

I definitely agree on crushed coral. Buffers will keep the oh nice and stable which is more important than any specific ph. If your local fish store has the same water parameters as u what you have should be good.