Making it as easy as possible is going to ensure that you keep a good schedule. IMO pwc
of 20% weekly should be done for the first 6 months to keep levels perfect, after that the tank becomes much more stable assuming you don't overstock/overfeed and can be reduced to every other week or even longer.
I have a 55 gal
as well and use a 32 gal
trashcan dedicated to pwc
. I bought a Mag 9.5 pump
(Mag 5 pump would work just as well) which I use to mix the SW
thoroughly, heat the water (keeps it at 78), and finally use to pump the water back into the tank using 20ft of 1" clear tubing.
I mix 25 gal
at a time so I have enough for 2-3 changes ready to go at any time. As Sadielynn mentioned getting your pwc
water to match the main tanks ph/sg
/temp is most critical and I also add any ca
buffers as needed during the mixing as well.
I also always mix my sg
slightly higher then the main and add a little FW
to reduce the sg
to match the main more closely just before adding. Having to adjust by adding salt is more of a pain.
Lastly if you don't have a refractometer for measuring sg
then I'd highly recommend one since the swing arm and floating hydrometers are notoriously known for being inaccurate.