Beware of chlorine when making large water changes. I’ve used a test kit to demonstrate to the client that although you cannot smell the chlorine like when you are at the pools, chlorine levels harmful to your fish (and biofilter) exists in tap water (note the bright yellow coloured reaction in the vial on the left). The vial on the right contains dechlorinated water shows no colour change.
Yours sincerely,
Dr Richmond Loh
BSc BVMS MPhil MANZCVS (Aq & Pathol)
The Fish Vet, Perth, Western Australia.
Veterinary Medicine for fish.
http://www.thefishvet.com.au
Ph: +61 (0)421 822 383
