Water change parameters swing, normal? ok? bad?

[CoralPlast]

Hi guys, i was thinking, what happen when i do a 20% water change in my 13g nano and my parameters swing? I mean, stability is key apparently, but like atm i have 8.35ph, 9.7alk 440ca and 1440mg. When i change water the salt i use (microbe lift) have a alk of 8/9 and also slightly lower ca and mg ...so i am lowering the kh and slightly also the others. This can be a problem?

 

[Randy Holmes-Farley Verified Community Expert]

Hi guys, i was thinking, what happen when i do a 20% water change in my 13g nano and my parameters swing? I mean, stability is key apparently, but like atm i have 8.35ph, 9.7alk 440ca and 1440mg. When i change water the salt i use (microbe lift) have a alk of 8/9 and also slightly lower ca and mg ...so i am lowering the kh and slightly also the others. This can be a problem?

None of those will move in a problematic way with a 20% change. Alk, for example, goes from 9.7 to 9.4/9.6 dKH.

 

[CoralPlast]

None of those will move in a problematic way with a 20% change. Alk, for example, goes from 9.7 to 9.4/9.6 dKH.

thanks for the answer!