The water temp is cold but not exactly sure on temp.what range should i be in to expand a bed at lower gpm, Im not sure if this is the exact system i have , as far as gpm rate goes, dont know if they cobbled something together to make it work or what, can i test for gpm of tank? could i upgrade the head for more gpm? and is it possible for the media and tank itself to be contaminated with iron bacteria, when i pulled water from spigot before softners and after sediment filter there was no smell of sulfur, then this morning brushing my teeth i could smell the sulfur it wasn t overwhelming but it was there.
I sounds as if the filter and softener are working fine except for a small amount of odor today or yesterday morning. So it's old, it is also high quality equipment and working well.
Put the filter, that's the one without a salt tank connected to it, in the backwash position and when it has a good flow to drain (2-3 minutes), unplug the control valve for 20 minutes, and then plug it back in and let it finish on its own without using water from when you started it to when it is done.
Then add a 1/4 cup of non scented household bleach to 2-3 gallons of water and pour it into the salt tank of the softener, poured down the brine well into the water in the bottom of the tank or along the inside wall of the salt tank (instead of down through the salt) if you don't have a brine well; a 3" diameter tube with a float in it. Wait for 2-3 hours and on your way to bed or everyone is going to be out for the day, then rotate the center black knob on the control valve to the right, clockwise until the motor starts.
Don't use water for the next 3 hours (or when you get up in the morning) it will take the knob to get back to where it was before you rotated it.
Then see how your water is, and if there is a problem, decide then what to do but if there is no problem, maybe you could find some other project to do until this equipment quits doing its job.
BTW, your backwash must be ok gpm wise or the equipment wouldn't be working (15 yrs) to remove the iron in your water or provide soft water.
You should not chlorinate/shock the well, that is a bad idea and there is no evidence that you need to do that.