We use a shelter shade product for ponds from tractor supply. The dye prevents the sun from allowing algae to form
I forget too :( but it's a chemical that keeps algae from growing.
High levels of blue-green algae makes makes look green. These can be increased by water temperatures great 80°, high level of phosphate. They may use alum to decrease the phosphorus in the water.
I dont remember either. N yep yep we had a very good time also.
Thanks! Your answer is awaiting moderation.