Originally Posted by Violeta
Congrats on your new fish. That is great you rescued him from Petco! The day before Vi passed, I was recommended to try Marcal on him so that is what I gave him but he was gone the next day.
Hmm.. In a 2.5 gallon tank, do you think I should get a heater/filter?
Do you keep a thermometer in yours for your fish? Also, you do use stress coat often?
Definitely get a thermometer. Depending on your location and how cold it gets there, you may need to get a heater... the concensus is that the water temperature should be 78-82 degrees. Also remember that the water temperature is always a few degrees (1 or 2) cooler than the surrounding air temperature. As to the filter question, it's up to you and how you eventually will want to redo the tank. If you decide to go with live plants, having a filter helps, but if you don't, just as long as you keep up with the required water changes, then you'll be fine.
Also, always use a dechlorinator like stress coat for any water changes.
Good luck and sorry to hear about your little bud... hope you find another little buddy to fill the void.