Is it OK to change aquarium water weekly?
For a smaller tank, change out 10%-15% of the water each week. For a larger tank, change 20% of the water each week. If you use tap water, allow it to sit for three days. Use a dechlorinator before pouring fresh tap water into your tank.
Can you change aquarium water too often?
It is possible to do too many water changes in an aquarium. The maximum frequency of water changes should be once per day. If you choose to perform daily water changes, be sure to only replace half of the tank’s water to avoid disturbing the tank’s biological balance and stressing your fish.
How often do you clean a 5 gallon fish tank with filter?
You need to clean a 5-gallon tank weekly, while a larger 15- or 20-gallon tank only needs cleaning once or twice a month.