I use Kockney Koi Pond Dechlor. I'll never use aquarium dechlor again. It seems to cost 20 times more as soon as they write 'aquarium' on the label.
[URL="http/www.kockneykoi.co.uk/productpages/m...chlorinator.htm"]http/www.kockneykoi.co.uk/productpages/m...chlorinator.htm[/URL]
It treats 75 litres of water per 1ml of dechlor, around 20 times more concentrated than standard aquarium dechlor.
It's actually stupidly cheap. For example, my tank is 260 litres, and I perform a 25 - 30% water change (around 75 litres) weekly. I therefore need 1ml of dechlorinator per water change.
1ml per week would last 500 weeks, so my 500ml bottle bought from Ebay for around £8 will last over 9 years.
So over the next 9 years I'll spend something like 84p per year on dechlorinator. Absolutely crazy when I think how much money I was spending before on products like Nutrafin Aquaplus.
Of course it won't last 9 years as i usually overdose it etc etc, but its still a really good bargain.
BTT