Here are some important facts on ridding of these bugs. You are correct that interceptor is obtained through a vet. What some people don't know is that " Doramectin)" is an alternative to interceptor and cheaper. SO, We mix it with water and add to tank, correct ?
Actually NOT !!!! Here is what you do:
One tablet of Interceptor should treat 400g of water. To be safe, remove all the hermit crabs and shrimp you can find in your reef, putting them in a safe tank separate from your reef. Give them circulation, a heater and top off daily to maintain salinity while in quarantine for their safety.
Crush up the pill until it is dust, and mix it in a cup of tank water. stir it for several minutes until it is fully dissolved. Remove the venturi tube leading to the skimmer's pumps so that no air is being injected into the body of the skimmer The medicine should have the ability to travel through all the water in aquarium including in any equipment such as skimmers and calcium reactors. Turn off any reactors you running Introduce this at midnight when all the fish go off to sleep and poured the medication into an area of high flow, and let it smother the red bugs over the next 12 hours.
Each day at noon, reinstall the tubing to the skimmer pumps to resume skimming the water. You shouldn't find any red bugs in your tank after this initial treatment. Repeat this 7 days later, and then again 7 days after that. Three treatments over 3 weeks is considered necessary to remove any possible future generations from emerging from the reef to re-infest the corals.
After the third and final treatment is administered, the water will be safe for the shrimp and crabs. This is not a treatment you have to fear. And the more of us that do it, the less likely we will share such pests with one another when trading frags. Always treat new coral arrivals with an Interceptor bath for at least 6 hours to keep your reef red bug free.