a small cup + frozen cube of brine + some tank water
Let the brine sit in the tank water till its thawed out. Then pour out the tank water straning the brine shrimp so they stay in the cup. Then lower the cup in the tank and mix the shrimp up with fresh water from the tank and then pour in.
The liquid the shrimp are frozen in can be very high in phosphates. Thats why we strain it off.