Pond Boss Forums INTRO New Forum Member Introduction Algae issue due to septic system?

Welcome to the forum! The moss you refer is the green floating mats in and on the surface of the water? I think this is or can be a problem with more established ponds and is caused by a build-up of nutrients in the water. Treating it with chemicals does kill it off in the short term but without removing the dying mass or having some other way to take up the nutrients it becomes an annual treatment as I understand it.

Nutrients can be leaf litter, fish waste, excess food, recycled plants, brush piles, logs....

Do you have plants in the water that you like or some that you would like to add?

On your septic system. How far away from the pond are your lateral lines? in my neck of the woods laterals can't be placed within XXX feet of the pond or property lines. Are you thinking you are dropping raw sewage into the pond?

There are multiple treatment options but if it were me I would nail down what is going on with the septic before doing anything else.