Recent content by vmatki

I deleted the basically duplicate post after merging topics and also removed the reference to the other thread below. jblizzle Thank you onBalance for so carefully reading through my PM and for tying it back to this thread. Your holistic view of the various factors is pointing towards a...

3-month-old white plaster starting to discolor Merged by moderator. I went ahead and combined these to avoid duplication. jblizzle My three-month-old white pool plaster has started looking less uniform “white” than it did at first. Specifically, the entire surface is showing various grey...

Thank you @Donldson and my apologies for the confusion with TC. Anyway, last night I was FC 3.5, CC 0. This morning I am the same. I guess I have passed the OCLT. Maybe we can rule out algae in the above considerations? This being the case, do I need to start a new thread, knowing what I now...

My TF100 test kit has arrived. Here are my updated results: TC: 3.5 FC: 3.5 pH: 7.5 CH: 400* TA: 80** CYA: 45 * The CH test only worked when I added the reagents in the sequence required for having copper in the water (which the Pool Store suggested I did – 0.3ppm – although I...

@Donldson Thanks so much for the link to the CYA-FC chart. I had no idea there was such a variance in the FC target depending on CYA levels. I thought I just needed to get both within their respective target ranges. So, if CYA between 30-100ppm is theoretically "acceptable", are pools in the...

@JamesW No heater, no copper based algaecides. Only abnormalities in the last week have been a drop to zero FC and then my self-prescribed treatment of 3 days of FC at 10-20. There are black deposits on the ozone return, but they do seem mould-like in texture. @Richard320 Do you think I should...

Wow! Replies already. Thank you. I’ve learned so much just from your three answers. Phew. I haven’t jumped in with the PhosFree quite yet. I was upsold it the first time I visited a pool supply store with a test sample, but I hung tight on the instinct that my (at the time) brand new pool...

First post! Hello everyone :-D Until this week I had an easy pool, very stable and crystal clear with gleaming white plaster walls. I was testing every other day and kept everything fairly consistently within the recommended ranges. On Monday I noticed the Cl was low – almost zero. In the...