Here’s my process. Right wrong or otherwise it works for me. Two full setups of everything mentioned below.
24 hours prior to adding the first fish I set up a 10 gallon tank with 7.5 gallons RODI. I heat some RODI on the stove to get close to 78 degrees. I add 2# of salt to make 1.020 Sg to match the LFS.
Aquarium calculator; Estimate the amount of solid salt required to raise salinity to a target level.
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I turn on a small aqueon in tank filter and a small in tank heater. I add a few pvc fitting for hiding and let everything run over night. For bigger fish like tangs I add an air stone.
Once the fish comes home I test the salinity in the bag and drip adjust into the bag if necessary. Usually 0.001 Sg or less. Float to match temp, then in the drink it goes. I feed LRS daily, but very little.
After the fish has been in the tank for 24 hours I dose Prime to bind ammonia. Others keep bacteria seeded filter media in their DT’s sump and add that to control ammonia. I don’t use copper so Prime it is.
After after 48 hours in tank 1, I set up tank 2 in a different room following the outline above.
After 72 hours the fish goes into a 30 minute, 150 ppm h2o2 bath per Humblefish’s Hybrid/TTM method. Then into Tank 2. The Hybrid method is still experimental but so far has worked for me.
Tank 1 and all the gear gets washed in the tub and sprayed with 6:1 bleach solution. I put a fan on it to ensure proper drying within the next 48 hours. After 48 hours of drying it gets set up as outlined above for transfer 3.
A minimum of 12 days total is necessary, not exceeding 72 hours in any given tank. If you go longer than 72 hours, start over.
Hope this helps.