50% water change enough to keep rays till big?

[scarletex]

Originally Posted by BubbleBubble

My brother's rays after stable and growing will change water almost 100% once or twice a week, until the backs expose.

He use the cheap sodium thiosulfate crystal and blast new water the rays are very happy, going against the splash, sakuras also. I know because sometimes i change water for him when he overseas.

Bro, sodium thiosulfate only removes chlorine from water. Here in Singapore, our PUB also use chloramine as a disinfectant.

[Schmike]

Originally Posted by scarletex

Bro, sodium thiosulfate only removes chlorine from water. Here in Singapore, our PUB also use chloramine as a disinfectant.

sodium thiosulfate will break down chloramine into chlorine n ammonia.

[fishyfishy]

Originally Posted by SIOWARO

this ? might be stupid,is it enough ,50% water change weekly for 6 3 2,keeping 2 rays till adult hood.

maybe i seperate the 50% to twice a week, 25% on Wed and 25% on weekend will be safer.