Pool Replastering bid Houston

I live in Houston am am looking to replaster my pool this Spring. I just got a bid which included two items that seem bogus: Nature 2 for $820 and "start and balance water" $585. I checked out Nature 2 on the Forum and that looks like a good waste of money. Is the other item something I can do myself or is it a legit item? Seems like all this would entail is dumping acid in the pool for a month or so. Also, they bid light replacement for $1200 to 1700 depending on LED or not. The replaster itself looks in the ball park for about $3000 for 22000 gal pool and spa. And coping repair was bid at 1800. Thanks

I have moved my reply to this thread to your other thread that asks the same question, and will lock this one so that we don't have multiple replies on the same issue in different threads. Please continue your posts and any answers in the other thread.

Thank you...

Janet