First of all call a pool company! Are you sure that you don't have a "mustard" algae problem? The heater needs to be looked at and the only way to get rid of rust particles is to vac to waste. You need to address the real problem because you don't want to swim in the pool the way it is. A pool company will test your water at a minimal cost and advise you for free.
Rust deposits from your heater are possible if your heat exchanger is old and has glass lined headers. The glass installed by the manufacturer is starting to deteriorate and it is exposing the steel underneath. The rust swells and then breaks off.
no you need a stronger heater specifically designed for a swimming pool
The swimming pool heater service usually takes about 1 to 2 hours. This of course can change if you have a larger heater.
What i s the best pool heater
You can buy a swimming pool heater in the Burlington, Vermont are at Leslie's Pool Supplies. They have a great selection.
A solar water heater relies on sunlight to heat the water. On a cloudy day the amount of sunshine is reduced, so the water probably will not be as hot. Solar PV panels have the same problem. On cloudy or rainy days the amount of electricity generate is much less.
Unless you leave the heater on, Yes
There are no combination heater/cooler units that we are aware of. The would have to be separate units.
Call a swimming pool tech to trouble shoot then show you how everything works.
That would depend on which heater model.
To stop the black residue from a baseboard heater, the wall around and near the heater should be cleaned as there are dust particles attached to the wall. This is called ghosting which fine particles of soot attach to the wall that is cooler than the temperature.
Try a pool shop
Cloudy water indicates you have air mixed with the water. It is common for hot water to be cloudy when you first turn on the faucet. It should become clear in a few seconds. The air in the water will do no harm. If you have a well then there may be a problem with the well. Have it looked into by a professional.
it warms the air particles... witch then transfer the heat to you
I'm guessing that you have build up in your water heater, just drain it and you should be fine.
DON'T turn it on.
Depends on what you want out of your pool ... If swimming only during the hot months is okay, then you don't need a heater. However, if you would like to extend your swimming season, you should consider a heater. A solar heating system can extend your swimming season a couple of months earlier and a couple of months later, but probably can't heat your pool year round. For example, here in sunny Southern California, I can comfortably swim from March through October (with water temps of over 80F). A gas or other fuel-based heater can provide year round swimming, if desired.
There might be a bad fuse causing the heater to not work. Check the fuses if they are all ok you may have a bad blower motor. when you turn the heater on and no air is blowing then it is your blower motor.
form_title=Swimming Pool Heater Repair form_header=11623 Please specify the type of pool you have.*= () In ground () Spa/hot tub () Above ground Which kind of heater are you using?*= () Natural gas () Propane () Oil () Electric immersion () Heat pump () Solar () Solar blanket () Unsure Please indicate why you need service/repair? (Check all that apply)*=  Heater won't turn on  Pilot light won't stay lit  Heater leaking  Heater cycles on and off  Heater won't shut off  Water not heating to desired temperature  Need regular maintenance  Other
This could either be due to the age or the materials used to make the water heater or the fact that the water heater has not been installed with vacuum breakers causing the geyser to collapse from the inside-out due to incorrect atmospheric pressure within the water heater
Hayward is a very popular brand of swimming pool heater. Raypak and Max-E Therm are other popular brands.
form_title=Swimming Pool Heater Installation or Replacement form_header=11613 Please select the type of pool that needs to be heated*= () Above ground () Spa/hot tub () In ground What type of heater would you like to use? (Select all that apply)*=  Natural-gas fired  Propane-gas fired  Electric  Heat pump  Solar heater  Want recommendation Is the pool indoor or outdoor?*= () Indoor () Outdoor
Heater core has air in it and or plugging up.
heater core going bad.
Probable failed heater core.