Cory Habrosus and Cory Pygmaeus help Hey FL I have a friend that is setting up a new tank. Well sort of the tank is "new to her" the tank was cleaned thoroughly and the ony thing she took from the last owner was the gravel. I have been helping her and she is really enjoying the new hobby until recently. Let me give you a run down on the tank. I hope to be very thorough so here goes. Tank was started over a month ago. This tank is about 30 gallons, lightly planted, with two small pieces of found driftwood. Drift wood was boiled for 4+ hours and sat in a bucket of water that was changed ever couple days for about a week and a half. Fully cycled with Endler Livebearers that are thriving. Tank is usually anywhere from 0/0/5 to 0/0/10 livestock = some Endlers 15 or so mostly fry and 1 Amano shrimp. Now here is where the fun begins. she loves the Endlers but only bought them to cycle the tank now she wants to keep them. So with only 2 types of fish in there she has big plans for a few types of nano fish. The first of these being cordoras pygmaeus and habrosus. So she came home from the petstore with some labeled as Pygmy Cory's. it turns out she got 3 cause she had heard me say cory's prefer groups of 3 or more. I later find out the tiny ones prefer groups of 12 or more. So she came home from the LFS with 1 pygmaeus, 2habrosus, 5 cherry shrimp. Recount= Endlers (mostly fry), 1 amano, 5 Cherry shrimp, 3 Pygmy-ish Cory's She felt bad that she didn't get enough for the cory's to be happy so she wen on a hunt to get more as that store was sold out when she returned. I also (being a good friend) went on a hunt to find more. later that day we meet up and she bought 6 pygmaeus and I had bought 12 habrosus. Wow thats alot of fish! but they are sooooo dang tiny ! So now to acclimation time. acclimated of the next 2 hours. Tank was tested first at 0/0/5. I took 5 of the Habrosus and put them in my 10 gallon bowfront with my betta. (They are doing FINE) Recount= Endlers (mostly fry), 1 amano, 5 Cherry shrimp, 7 Pygmy Cory's, 9 habrosus cory's ******* NOW THE PROBLEM STARTS ********** these things are dropping like flies roughly 2 a day of the pygmaeus 1 survives. of the habrosus there about 7 or 8 left. You should see her face she looks like she personally killed it each time one dies. I want to help her stay in love with this hobby but I need to find out why they are dying first ! Are these fish just ridiculously hard to keep ? Any help would be GREAT ! I have my own theory's but I'd like to hear yours.