Ditto. There are some D.O. meters in the 200 to 300 dollar range but yes most of the high quality ones go for much more like DN says.

IMHO for a recreational pond you are wasting money by buying one. Why? First of all if you have diffuser system set up to destratify the water, there should be no reason to check D.O.

Let's say you still want to measure D.O. and you don't have a diffuser system going. You find an anoxic layer near the bottom -- so other than knowing it's there -- what are you going to do about it?


If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.