What To Do If Chlorine Reaches 0ppm?

[JPvZ]

I currently use my hotub once every few week (been busy ). I currently use dichlore exclusively as my chlorine source. I try to get out to the tub every few days to check on it and add chlorine as necessary, but sometimes I miss a few days and when I check it, the chlorine level may be 0ppm (oops!). In this case, what should I do?

When this happens, I typically add a bunch of dichlor (1.5-2X my normal dose - I err on the high side), along with a couple of cap fulls of non-chlorine shock (added at the same time - that ok?). Will this make my water safe for use? I would think it would kill anything that happened to grow pretty quickly - could I use the tub within 15mins?

Thanks in advance!

[quantumchromodynamics]

I recommend that you read Nitro's Approach to Water Maintenance.

[JPvZ]

I recommend that you read Nitro's Approach to Water Maintenance.

Thanks, I'm familiar with it. But it doesn't address what to do if FC drops to zero... which I'm sure has happened to people on numerous occasions.

[Dnepr Dave]

Add more chlorine!

Dave

[quantumchromodynamics]

What is your cyanuric acid level?

[JFK3rd]

Gonna bump this for a clarification. Got home today and mine was at 0. Forgot to add last night after we got out. Is it okay to just bring it up to safe levels or do I need super chlorinate or MPS shock it?

[chem geek]

I'd add the amount you would normally add for your bather load and see if the FC is at the expected level a couple of hours later. If not, then shock to a higher level. If that still doesn't work, then decontaminate. A spa won't always go bad so quickly though it sometimes does. However, I'm assuming you added chlorine when you wrote your post. If you go 24 hours or more without chlorine, that's much more risky.

[JFK3rd]

I did and all seems well.thanks for the reply though.