I purchased Vitachem Freshwater formula for my tank to aid my tetras who have some mild ammonia poisoning. After purchasing, I realised it doesn't say whether it's safe for inverts. I have 4 tiger nerites and 3 ghost shrimp in my tank. I emailed the company but haven't heard back as of yet and probably won't for a few days as I just realised they are in FL! They are busy preparing for hurricane Irma. Anyone know or use this product??