Just like to say hello. Ive just built a garden pond measuring 4m x 3m x 1.5m at its deepest point. At the mo it as 4 ghosties, 2 koi (each 3" long), 2 golden tench, a diamond back sturgeon and a few comets, shubunkins and gold fish in. This is my first pond and im a TOTAL novice to ponds and keeping fish, so please accept my apologies if some of my questions seen very basic or simple. Hopefully with your help and advice i can have a very happy and successful pond and fish.