Are there any seasonal considerations when using a Secchi disk reading as a proxy for the algae and plankton density?
If so, what are the modifications to these considerations for ponds in Florida, versus Indiana, versus northern Minnesota?
Finally, is there any value in fertilizing when your pond has a Secchi disk reading of less than 36", but there are bottom feeding fish that are stirring up the sediments as a major contributor of the water murkiness? (Or is the lack of available sunlight in the water column probably already the limiting factor for the growth of photosynthesizing organisms?)
