Hi all, New to the forum, also new to fishkeeping. Looking for suggestions, scoldings and ideas about what to do with my current setup. Warning: this is a long saga. A year ago or so, I bought my dude a Fluval Edge. Mostly because he wanted "a pet fish" and it looked super stylish. Of course I have since discovered what a nightmare it is - from malfunctioning preset heater (I have yet to find an adjustable heater that can fit the tank), to cleaning, to stocking. In any case, after the untimely demise of 5 neon tetras and 6 rummynose tetras over the year (max of 7 fish in the tank at any given time) I now have one solitary neon (Runty) left and he is the sole survivor of the ich that killed his 6 tankmates 2mths ago. (Of course the preset heater could not be used to raise the temperature of the tank either beyond the standard 27deg...so API Super Ich Cure was all I used) Two weeks ago I decided to restock and buy a bigger 20 gallon long. The original plan was to use the Edge as a quarantine tank for new fish as neccessary, and to give Runty some company, him being a schooling fish and all. We bought the 20 gallon and (stupidly) decided to cycle the tank with fish. I used some decor from Runty's tank, but put new gravel and new filter media in. We started out with 7 neon tetras. Then added a school of 5 black neons. They were doing great so we made another stupid decision - the purchase of a common pleco which according to the wonderful Pets Unlimited person "will eat all your algae". She told us she keeps her common plec in a 5 gallon, so this could even fit the Edge tank. Since we wanted one pleco for each tank to "eat all the algae", the common plec got a companion, the sailfin plec "which grows smaller than the common one! and is so pretty!" Well, since I knew nothing about a pleco, I did some reading. Both plecos went back to the store three days later and were replaced with a clown pleco and a bristlenose. The clown's fate is to go into the Edge tank and the bristlenose to remain in the 20 gallon. My current setup was working great until yesterday. To try to counteract the idiocy of stocking my tank uncycled, I have been doing daily 25% water changes. The 7 neons were schooling together, the 5 black neons hung out in a pack and the bristlenose/clown were moseying about. Then yesterday I noticed I only had 5 neons... Sometimes I counted 6 but never 7. So I launched a search and found them in the filter trapped beneath the filter foam. One of them was swimming valiantly in his tiny little cell, the other was dead. I fished the dead fella out and released the prisoner and he was behaving normally and schooling with the others again but today he was found dead. Now I am starting to wonder what happened. Everything I have read says that "neon tetras are good swimmers and a healthy one will not get sucked into a filter intake". Does this mean the other tetras are ill? Is there anything I should do with the tank? It is a little too late to go back now that the thing is stocked... Once the 2 week quarantine is over, my plan is to transfer the 5 neons and clown pleco into the Edge tank to join Runty - or alternatively to have Runty join the 5 neons and bristlenose in the 20 gallon long, while putting the 5 black neons into the Edge. Is this suitable for an Edge tank? Can a clown pleco live in a 6 gallon tank with a few small tetras? Would it be better to have him stay in the 20 gallon long with the bristlenose? I would like to put the clown pleco in the 6 gallon - I think he would be happier on his lonesome, but am a bit worried about the size of the Edge. If you've read this far, thanks for the patience. Any suggestions/ideas are most welcome.