About 6 months ago my 75gal reef aquarium started leaking from one of the bottom seals. I transferred all the fish and rocks with corals to a 40b. I'm currently building a 200 gallon plywood aquarium. It will be 76x30x24". I can only mix 55 gallons of saltwater at a time. What would be be best way to transfer the rock/corals to the new tank? Have 80lbs of caribsea sand from the 75gal. And another 80lbs of dry special grade. Should i fill it 3 times to around 150 gallons with a heater and wavemaker then add the rocks and sand and fill it the rest of the way. Using as much of the water from the 40B as i can. Still about a month away from completing.