Hello!, I had a 70 or 75 gallon tank given to me with a stand, fluval heater, and a gravel vacume and hose.(first tank ive ever owned besides beta tank ) It sat in my living room empty for a couple weeks, got tired of seeing it empty and put a hang on back filter and a few fish in it while deciding what I was going to do. I want a planted tank so i guess im going to put dirt 1/2 inch on the bottom,I have 50lbs of black diamond was and bukoo sand. I was thinking about mixing the two to give the bottom like a salt and pepper look. But I dont have any plants yet or hard scape yet still debateing on the rest of my setup and lack of $ rite now. Would it hurt my fish if I drained the water and put the bottom in without plants and hardscape? And added as I went? Also I am open to any advice or ideas yall have!