So VERY grateful for your input! Yes it's been months since i have visited forum.... total NERM is cool! Understand the break down... i'm a soil/plant nerd going aquatic. got it and yes puffers are tough except the one i have LOL. I did beat the cyno without the meds, Won't say how because i don't want anyone to take off the cuff info from a personal experiment as gospel so to speak! The bamboo shrimp idea was stupid... i'll agree, although i did throw in a couple guppy, an NO he does not bother them or vice versa. He even has a borneo loach now, all is good (i see your eyeballs rolling lol). I Can say peewee (dwarf) puffer is healthy and fit.... so is his tank now, with minor effort actually, i panicked and didn't think it through. The addition of a certain wood, some soil/plant derived acids, with water changes did the trick.. Will say... this will be the ONLY 5 gal tank i will ever own! my larger tanks give me no trouble. Thank You again, wouldn't mind conversing on occasion... Nerm world is new to me, not the science but certainly the fish are!