One easy trick to help out the acid treatment is to cut your pump ac cord and install a 110 ac outlet and add a plug on the pump side. Under normal conditions the pump is plugged into the outlet, which leads to the AC control box that cycles the pump when the thermostat fires up the air conditioner. When you need to service the system you unplug the pump, fill your strainer with barnacle buster, full strength. Open thru hull and plug your pump into an AC source for about 20 seconds then unplug and let sit for an hour or two. Make your hook ups regular and fire up your air conditioner. There, all done. Could add food coloring to the strainer with a lookout to tell ya when the water changes to know when to unplug.