I'm having awful trouble trying to source some untreated decking
The only stuff available is hardwood decking and is far too expensive. One of the guys I spoke to told me that modern decking preservatives are safe and even gave me the details of a co who treats timber so that I could check!?
I've done a bit more digging and B&Q decking is preserved with "Tanalith e" which is made by a company called Arch Timber Construction who I contacted and who confirmed to me in writing:
Thank you for your enquiry.
"We wish to confirm that TANALISED E pressure treated timber is suitable for use in, around and over garden ponds.* However, where fish are present we recommend that direct water contact is avoided. *
Whilst we are confident about the safety of TANALISED E pressure treated timber, fish are very sensitive creatures and may respond unfavorably to changes in their surroundings."
Given that I will do my best to cover/waterproof the troff anyway (so the run off from the timber will be minimal) I think this sounds ok.....!??
Paul
