hi everyone, I am so pleased to have found this site, I have learned so much from reading the outdoor pond forum but in need of help., I became a pond owner 1 year ago after buying a new house. Tucked away in the yard was an extremely overgrown pond, full of oxegyn weed, water lillies and SNAILS!!!!! but the water was very clean. After a big clean, trim and new plantings and a month to settle we added 8 goldfish, which have nearly doubled in size and have produced babies! So far I have been able to keep the pool chemical free and hope to keep it that way. I would put the age of the pool at approx 30 years, and in that time a leak has occured about 10cm below the original waterline which I would like to repair to raise the level. My dream wish is that someone who has had experience with this type of old pool will be able to give me an idea if there is any way to fix the problem. Is there a godsend out there? fingers crossed!