I had ich come in with two mail order dwarf cichlids....I raised the temp to 85 degrees F at a rate of about 1 degree per hour, and added aquarium salt at a dose of around 1.25 - 1.5 Tablespoons per 5 gallons and kept it there for 6-7 days. The ich symptoms were gone after about 2 days, but I left it as is for the additional 5 days to make sure it was all gone. Then I did a 25% water change once a day for a week to gradually reduce the salanity, and slowly dropped the temp back to normal by a degree every 2 hours. I did add 3 airstones running wide open to add O2 due to the higher temps, and everyone did fine....except the two fish who had ich...the <not so nice word> guy who sold them shipped them with ich...the stress of shipment, ich, and treatment was too much...they were in bad shape when I got them.
I have the following fish in this tank, and they all did well. I'd check your particular stock's salt tolerance levels before going this route:
2 Clown Plecos
2 Apistogramma Agassazi (the ones who had ich)
2 Apistogramma Rotpunkt
2 Kribensis
14-16 Zebra Danios
6 otos
Blue Mystery Snail
Malaysian Trumpet Snails
Ghost and Amano shrimp
Various live plants
(75 US Gallon Tank)
I have 2 external canister filters running on the tank, and only had mechanical and biological filter media.
I have since received 2 BEAUTIFUL replacement Apistogramma Agassizzi.