Seriously getting sick of paying a pool company to screw up my pool's chemistry and just can not seem to find the time to check and add beach everyday. I actually bought a Harward chlorinator and cell which is still in the box, but then realized I think I would be better off getting one of the automation units which would also do the SWG ... this is where the confusion starts. I just can not seem to get reliable information on the differences between the units (even from the tech support).
My pool (no spa) is pretty basic:
1 pump & filter
1 suction line (floor and skimmer)
3 returns (wall, bench seat, old-school whips (not used, but during a remodel, I decided to keep this circuit in case I ever needed it) with on/off valves
1 waterfall with butterfly valve on branch after filter
Gas heater (currently plumbed BEFORE the solar ... )
Electric robot cleaner (since there was not a return for a suction cleaner without loosing the skimmer)
So, I can imagine needing:
3 valve controls (solar on/off, waterfall on/off, wall/bench 3-way).
1 relay for the pump (although I guess I would need 2 if I switch to a variable speed pump)
1 relay for the pool light (maybe ... would require a re-wire)
1 relay for an external spa (totally theoretical at this point)
1 relay for landscaping lights (again, already on a switch, but could rewire to make them remote)
Looking at the available units, here is what I think I have figured out:
Pro Logic P4: 3 valves, 4 relays
Aqua Plus: according to Hayward tech: identical to P4 with added salt cell
Pro Logic PS4: 4 valves, 4 relays
Pro Logic PS8: 4 valves, 8 relays
1. Do you agree that P4 and Aqua Plus are identical controllers (price seems similar for P4+cell OR Aqua Plus)?
2. PS4 seems to be significantly more expensive than the P4 for just 1 added valve. What else is different?
3. Again PS8 is significantly more that the PS4. Is there more than just the 4 extra relays? Do I need that many (I know hard for YOU to answer for ME, but looking for advice )?
4. Given that I think my pool is around 20k gallons ... is there an advantage to getting the 40k cell over the 25k cell?
Thanks for any info you can supply.