1 time a week to 1 time every 2 weeks
It depends on how often you clean the tank. you dont need a sucker fish if you clean your tank alot. If you dont clean your tank that often then get one. you should talk to your local pet store for more information.
every other week
ones a week
As frequently as you didn't have them. They may clean the glass and eat debris, but they still make waste.
weekly 10 - 20% water changes
They usually do not need to be cleaned unless you are using a cylinder for nitrox.
you should do a 50% water change every other week
Once a week :))))) i have experience
Floors mr. clean septic tank
At least once a week. Twice is usually good.
when the water starts to get dirty if it is a bit dirty then leave it when it starts to get really dirty clean the filter and your fish tank