If u dun feed a lot , 3-4 days change half
if no filter and small container 2-3day can be longer because they are hardy fish
Why need to do this? Very troublesome leh
WC or the bottle thing that im talking abt?
Wc for the health of the fish
Bottle method is to dechlorinate the water
Allow the chlorine to evaporate naturally. Fill a bucket or tub with the water you want to dechlorinate. Do not cover it, and place it in an area with limited airborne particles and debris to prevent contamination. Over time, the chlorine in the water will dissipate due to exposure to the sun and air.
Answer: To put it simply, aged aquarium water is water that has been allowed to sit and "age" for at least 24 hours prior to use. Anyone can age their own water. The bigger question is whether using aged water is preferable to using chemically treated water. Sep 9, 2017