Forum Title: what opening chemicals are required
so I bit the bullet and cancelled the pool company that was coming to open and did it myself. Pool opened clear but dirty with the usual leaves and worms that always manage to find their way into my loop-loc cover??? There was a notable green fuzzy ring around the edge, returns fittings, steps and skimmer despite water temp only being in low 50s (unusally warmer winter for CT this year) - I thought a bit of algae. Also, significant staining (?metal - we have this issue just usually not this extensive) Opening test - FC 0, CC 0, TA 80; CYA 60 (surprised as this usually is lower when I open) PH 7.2; didn't test salt yet b/c can't use SWG yet and didn't test CH b/c vinyl. So with the green fuzzy stuff - I start the SLAM. I have added NOTHING but bleach - so my question is 2 fold. What MUST I add to open the pool? Poly quat or is SLAM and then maintain proper levels enough? opening kits sold by stores have a lot more stuff in them - are they metal stops, who the heck knows what else--last year they dropped some plastic ball?? So second part - why no or low CC despite what I figure is algea? I vaccuumed leaves, brushed sides and walls and added 12.5% bleach to get to shock level of 24 - over night dropped to 20 with no CC? doesn't make since - water clear but dirt on floor. Dolphin in to speed things up while I'm off to work - add Bleach to get back to 24. Drops to 15 but still 0-0.5CC - this makes no sense to me. Water is crystal clear but just crud and stains on bottom I'm still working on - still not enough daylight in CT! still some green staining in skimmer box. hopefully this post makes sense...I think my pool info is in my sig (at least it was last year) if not let me know what else you need. (I can try pictures too if needed)
Category: pool Post By: AGNES MCDANIEL (Columbia, MO), 02/11/2019

Maybe no CC because you had no FC (at first) to kill and begin the transition process to create more CC and ultimate oxidize it all? It might take a while to begin that process. Regardless, you're right about the need to SLAM (link below). No algaecides or anything other than bleach. You might also want to review Pool School - Opening Your Winterized Above Ground Pool to ensure you're not missing something significant. Once you pass the 3 SLAM criteria, then you'll need to see if you have enough metals in the water that warrant metals management. One thing at a time though. Good luck!

- TANYA PARK (Fishers, IN), 03/24/2019

You don't always see CC with algae. You've got one of the three SLAM completion checks complete already! And those readings look great. SLAM away and brush till your shoulders ache. When you pass an overnight loss test and the water stays clear even after brushing, you're done. Let the FC drift down and recheck it all and see if you need anything else adjusted. I've never put algaecide, phosphate removers or any other miracle snake oil in my pool and it stays open year round. You just don't need it if you maintain adequate FC. Not sure what to tell you about the stains. If you do decide to try the Ascorbic Acid treatment, I'd suggest waiting a couple weeks until all the other chemistry is stable and you know there's no algae to spring back to life.

- P Stevenson (San Jose, CA), 04/02/2019

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