Anthony,
I've had the same successs. I started taking care of my pool Oct 1015. All I've done is brush, add Bleach, trichlor, MA, and baking soda. I used trichlor for a while to raise the CYA level so I never had to add any stabilizer. I keep the CYA on the low side (40-50 ppm) so I can use trichlor tablets when I travel. We have a very challenging environment with Florida weather. High humidity, torrential rains and windy conditions are perfect for development of many problems. Worst problem I've had is invasion of worms after torrential rains. They die within minutes and get picked up by the suction cleaner. Just ugly in the mornings after.
Slime mold spores are prevalent in most soil. They are actually single cell organisms that usually thrive on bacteria and protozoan populations in soil and die off when their food supply is depleted. Makes me wonder what they are eating in your pool... I looked at multiple systems to sanitize my pool and ended up deciding that chlorine via tfp method was best combination of effective and practical for me at a reasonable cost. I highly recommend it now after almost 2 years of success. Sounds like you'd want to start with a thorough SLAM after you complete the necessary conversion!
I hope this helps.
Chris
..."Makes me wonder what they are eating in your pool"......how about the possibility of the (probably) thousands of these little springtail insects that are all over the water this season? Organic matter to feast on? They wind up in the filter by the droves. Never had them before and sure I hope not to see them in future swimming seasons. The water does not smell quite as good either as it did before these things showed up. I still consider them to be the random variable this season that may be contributing to the rather unusually excessive problems with the mold and slime. Last season was basically free of any problems with water clarity, mold, or slime.