Thank you for your response. I do not need anything doing currently, just asking the question following my post on Koi health. It really is a general question to see if people offer this type of service as it might be helpful for our membership. Regards.
I saw a van for tranquility ponds down my street the other day.
The guy looked like he was cleaning the filter and doing water tests. Don't know what they charge though and to what extent they do pond maintenance. He is based in Rawcliffe