I decided to dose my tank with internal parasite meds again. Tetra Para guard seems to work well for me. Promblem is, its almost 10 bucks. And I have to buy two packs to dose 125g. Plus it recommends x2 treatments... thats almost $40. Guess what. Amazon has it for under $4. Plus I pay for prime so I get free shipping. I've gotten to the point where I always check online before buying anything. I did the dame with Seachem Purigen. Petsmart and Pet Supplies don't carry it, but Amazon does. Between the LFS and Amazon, I really have no reason to go back to the chains. Just thought I'd highlight the money that can be saved.