Originally Posted by Flashygrrl
Sounds like you (or him, really) had a lot working against you.
1. You should have had a <span style="color:#3300FF;" onmouseover="return escape('A very important equipment used to regulate the temperature of the aquarium. It may or may not be included with a thermostat.')">heater</span> for him, 70 degrees itself is insanely cold for a Betta.
2. No filter. You said the water was pretty yellow? Probably ammonia or junk from the feeder block, and leftovers from the bloodworm fest. The full water change (never ever advisable in a tank that's not a bowl and no need for it with <span style="color:#3300FF;" onmouseover="return escape('Process of removing waste material from the tank water to prevent pollution')">filtration</span>) only served to stress him out more.
I hope you learn something from this experience...this forum is all about learning and asking questions, but it's extremely important that when given an answer, that answer be followed or stuff like this happens. I'm not saying this to be rude or mean, and I'm sorry if it seems a bit harsh (losing a fish sucks) but hopefully it also serves an example to other new people so they don't have to go through the same thing.
Wow, just a little harsh on the answer thing Flashygirl.....if you read the post here on this message, some say add the slow release, and others say not to. Some said not to feed him, others said to. Then I read to change the water 100% then the next search brings up only to change 50%. I really did try to ask alot of questions and follow the advice here. My petshop tended to lead me down the the opposite road of what advice I got here and to be honest, this site is were I want my information. I guess I did not filter enough or ask the right questions.
My pet store suggested putting in a bunch of bloodworms and 2 3 day slow releases...yeah, that would not have caused any problems!! It seems everyone has a method that works for them but Purplely's end I think came from the darn heat in the house being turned down. It was a oversight as the family was loaded up in the car and as I did my quick last run throught the house to make sure everything was off and past the thermostat and thought why run the heat at 70 all week. I kicked it down to 65 and that was it. The temp in our house is a constant 70 degrees and he seemed fine with it. I read alot of post of people having their bettas at the office. I know my offcie building can get pretty cold on the weekends. Somehow I wonder if 65 is really too cold considering the conditions others must see.
My set up was a simple pet store set up. We had a bowl, it is a 1.5 gallon along with 2 live plants in the middle and rocks. He seemed very content with a nice bubble nest about a week prior to leaving on vacation. When we left he still looked a little full from the bloodworms. My wife thinks it was the worms that did him in. He never looked great after he gorged himself that week before we left.
Well, we will try again. Our original plan was to start off with the 1.5 and then when a room being redone is completed, we were going to get him a larger tank with all of the filters and heater. I guess we will have to wait until the room is done and then just get the right set up and not the pet store version.
Thanks to everyone for your help in this. This is a very knowledgealbe forum and I appreciate everyones insight.