cleaned filter

I swear every time I try to help my fish, I end up hurting them. I just learned that you shouldn't change the water the same day you clean the filter. Because it's too much change for them to take. If this is true, I'm going to lose every fish in the tank. I learned that you're not supposed to...

Hi, I am an eager future to be AXOLOTL owner. I have done some research about cycling, and I don't really want to buy the products. Do you have to cycle, if you clean the tank on a scheduled basis without a filter and if so, how long should the scheduled basis be? (eg. once a week or everyday?)...

My guppies are dying? One at a time. About every third day and only the females? 2 year old, Fifteen gallon tank, 8 adult guppies, just had 25 fry. Also 2 Kory catfish, about 1-1/2 inches long. My fluval (20gl size) filter gummed up with a milky algea looking stuff and ran dry. I had no choice...