I'm in contract on a house on the central coast of CA. One of the reasons I liked the house was the pool! My family had a pool many many years ago and I took care of it as a teenager, now I'm getting into my own thing.
I will admit I am out of touch. We had a cartridge filter and I used to brush and vacuum the pool myself, and we had this octopus thing that puttered around the pool and flailed its arms... but now there are robots, sand filters, etc. (chems I understand I'll need to just read the forum posts about so no worries.. yet).
Anyway, could someone tell me what they see here, and is there anything I should be concerned about (or investigate further)? I'd appreciate it.
Also I think that square thing is a heater, are they expensive to run?