Here is what I'm currently doing - I found this on a google search and I'm on day 6 now. Fish (and snails) all seem quite happy.
It does use salt but my MTS don't seem to have a problem with it and I've got all the salt in already.
I used airline tubing and a gang valve to slowly add the salt water to the tank, so there wasn't a sudden change in salinity - took hours each time.
(the following is all from the post I found online - I'm currently doing this process with a Honey Gourami, Cardinal Tetras, Ghost Shrimp, a Betta, and Yoyo Loaches)
I have a community tank which includes cories, SAE's, Gold Nugget Plecos, Yoyo loaches and most importantly, for the purposes of this article, Queen Arabesque Plecos (as these are very, very sensitive fish).
I have determined this protocol to be successful without the use of medications.
I normally maintain the water temperature at approximately 78F (25.5C).
Salt is defined as aquarium salt and NOT table salt although many folks indicate that table salt is acceptable!
Upon observing a white spot on a fish or a fish brazing themself on various tank appurtenances:
Day 1
Increase the water temperature to 80F (26.6C)
Perform a 20% WC.
Add 1 Tablespoon of salt per 20 US Gallons of water (76L, 16.6 UKG)
(55 gallon = 2 1/2 Tbsp) (10 gallon = 1/2 Tbsp) Don't forget to Prime!
Day 2
Increase the water temperature to 82F (27.7C)
Add 1 Tablespoon of salt per 40 US Gallons of water.
(55 gallon = 1 Tbsp+ 3/4 tsp) (10 gallon = 3/4 tsp) Don't forget to Prime!
Day 3
Increase the water temperature to 84F (28.8C)
Add 1 Tablespoon of salt per 40 US Gallons of water.
(55 gallon = 1 Tbsp+ 3/4 tsp) (10 gallon = 3/4 tsp) Don't forget to Prime!
Day 4
Increase the water temperature to 85F (29.4C)
Add 1 Tablespoon of salt per 40 US Gallons of water.
(55 gallon = 1 Tbsp+ 3/4 tsp) (10 gallon = 3/4 tsp) Don't forget to Prime!
Days 5, 6, 7 and 8
Do nothing
Day 9
Perform a 20% WC.
Decrease the water temperature to 84F (28.8C)
Day 10
Perform a 20% WC.
Decrease the water temperature to 82F (27.7C)
Day 11
Perform a 20% WC.
Decrease the water temperature to 80F (26.6C)
Day 12
Perform a 20% WC.
Decrease the water temperature to 78F (25.5C).
Day 13
Return to the typical maintenance protocol.