Hi Walter,I use it on the feed,gets rid of worms,at the minute I scrape the loft floor and add it to the loft white,I'm going on to deep litter later on so it will be added to that.Do a search Walter,there's loads of info.No need to get a lot,it does go a long way.I have a couple of mates who use it regular.Ideal for getting rid of various nasties,snails,ants etc. Never tried it in the bath ?