water changes filtered

Today I did a 90% water change on male's 10 gallon tank and a 70% change on my females' 10 gallon tank. As I was adding new water to the tank and measuring out my conditioner, I ran out! Unfortunately, I also have my agressive female, Daphne, in an unfiltered 1 gallon bowl for the time being (I...

So my main question is about maintaining my water at this point. I realize now that I had a few misconceptions about keeping a betta healthy so, while I tried my best with what I knew, my guy's habitat could probably be more balanced. I'm expecting that I need to do a water change but I don't...

I have a 5 gallon tank with a whisper micro filter. Originally I was going to try to cycle it, but then I realized that this filter uses disposable filter cartridges. Is it still possible to cycle it or will I need a non disposable cartridge? Also are there any that are available for this...

I have a 2.5 gallon divided tank with a heater and filter. It's one of the BettaBowl aquariums from PetSmart. I'm a college student, so I travel with my fish a lot. Divided in the tank, I had two bettas, Charlie and Saphira. In the past few weeks, Charlie has been really sick, lying on the...

Ok, so would it be ok not to use a filter? 50% water changes every week? Would that not work? Thanks!:-D:thankyou:

Hello, I have a divided 8 gallon tank which is filtered and heated with only a female and a male betta on each side. I have never checked the water values because my bettas are great. My question is: How frequent water changes should I make and what percentage? More info: It is not a...