i have a 5.5 (really only about 4.5) very inconsistent though :/ maybe because i dont have a filter??
all my petsmart has are fluval, aqueon, biorbe, marina and topfin... any experience with any of those?
Hrm, I trust Fluval for sure, Aqueon, Marina, and Topfin I do not trust. I've had a Marina C10, it didn't work. Got another one, also didn't work, so I don't trust that brand for heaters, I've heard Topfin heaters shatter, so I wasn't willing to take the risk for their heaters. I would say Aqueon is okay, but I've also heard some horror stories with that brand.
Biorbe, no clue.
And yes, without a heater your water temperature may be uneven. Since the filter pushes water, and you're supposed to place the heater near water flow so the heat gets evenly distributed.
how do you add new water to a 10 gallon tank once performing a 20%-50% water change? do you put the new water in the tank and put in water conditioner? or do you have to sit it out with water conditioner added for a day then add the new water?