switching substrate

I’m planning to switch my substrate to black diamond blasting sand(medium grit), I’ve done all of the research and concluded that this would be the best option for my tank, but I have a few questions: 1. Would a 50 lb bag be enough for a 29 gal long tank? 2. How much sand should I plan on losing...

This is my 29 gal long tank, I really want to switch the substrate to sand for my cories and khuli loaches, what would be best and look best? These are the fish I have: - two neon tetras - two angelfish (one silver with black stripes and one koi) - three corydoras - two khuli loaches - three...