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If need be, I can screw the deck cover shut. It becomes a trade off of security vs. convenience. I'm planning on adding a remote switch to manually turn on the pump, so I can turn it on when adding chemicals without needing to enter this room. At that point I'd only need to enter to backwash...

Thanks Chris. Message received loud and clear, I really appreciate the help and guidance received here. I spoke with the pool company, they will take back any unused sulphuric acid, so I don’t have to find alternative disposal methods. Probably tomorrow I’ll remove the sulphuric acid tank...

Thanks for the confirmation, I'll get the sulphuric acid out of there ASAP. I'll need to find a safe storage / disposal for it, I don't want it inside the house or in our basement, nor do I feel safe storing it out in the open. This thread started with me finding out that the sulphuric acid...

Thanks for the advice, and you're right I better get the acid out of there ASAP. Once the acid is removed, there is no hazardous materials left in the there, and I can probably get away with slightly less rigorous precautions. But until the acid is out and I've drained all the existing pipes...

Thanks a lot Chris, it confirms that I'm better off not using the pH pump for HCL. Having the rest of the equipment, pool pump, filter and SWG in the equipment room should be fine. Do you know having the sulphuric acid in there would be considered a hazard ?

Thanks for the input guys, some replies inline. There is a fan, a small 100mm one through the vent pipe with return though another 100mm vent pipe. The fan was added to prevent extreme humidity, and it is currently on humidity control - but I can easily change it to run 24/7, I can also look...

Thanks for checking, yes I think diluting is the safest option - and the more I've looked into it, the less I'm worried about it. I went and bought long chemical resistant gloves, protective eye goggles and a face mask. I'm more worried about the potential issues of fumes from the HCL in the...

Also for polypropylene this link says the below, so again even a 20% solution isn't rated as A, so again I'm thinking a 10% solution would be safer. Hydrochloric Acid 100% C-Fair Hydrochloric Acid 20% B2-Good Hydrochloric Acid 37% C-Fair Ratings: Chemical Effect A = Excellent. B =...

Thanks for the interest, the manual for the Etatron B3-V peristaltic pump says (direct link, with the english manual starting at page 9) 2.3 Materials in contact with the additive Hose: Norprene Nipples: Polypropylene Filter: Polypropylene Suction tube: PVC Discharge tube...

I got it as part of a kit, and in this particular application there is no way to say "run acid dose at X percent, or for N minutes a day". But yes, I agree that you still have to test the water and make any corrections. So far the pH probe has been reliable, my Taylors K2006 testkit...

I got long chemical gloves, protective glasses and a face mask as well. I too prefer to error on the side of caution

Yes I’m back. I got my Taylor K2006 testkit from BEHQ in Spain, they shipped it to me. However it was quite expensive, once shipping was included it was almost 3x what I see them advertised for in the US. Next time I think I’ll try ebay from the US I think.

I’ve been thinking how to contain acid vapours, what if I use two containers like Where the acid vapours are trapped in the cavity above the liquid acid in one container and water mixed with a base in the other. I don’t have issues with vacuum when acid is removed by the acid pump as it can...

Thanks, yes I did know that must always add the chemical to water, not the other way around. I'm still a bit nervous about diluting it myself, looking at a safety data sheet it looks kind of scary. Amongst other things, it says only use in well ventilated areas. My pool equipment is located in...

So you would not be worried about having to dilute a 32% HCI to 10-15% assuming proper protection is used ?

I installed a water meter on my refill pipe, that way I can measure how much water is added to the pool to replenish loss due to backwash, splash out, evaporation etc. To me the value is not just in finding the total volume in your pool, it is also to be able to track if there are changes to...

I'm having issues finding hydrochloric acid in a suitable low concentration, I can get it in 32% concentration that likely will be too strong for my peristaltic pump. The pool companies I've checked here, all use liquid sulfuric acid or dry sodium bisulfate, that essentially is sulfuric acid as...

Thanks I’ll change the pH target to 7.8 until I can get some other acid

It will be a couple of days before I can get some muriatic acid, do you think I’m better off turning off the automatic acid dispenser and let the pH value creep up? Maybe set the target at 7.8 instead of 7.3 so it will not dispense any acid unless the pH goes up a lot?

Thanks a lot! I’m not surprised this pool installer messed up in yet another way ... have had a series of issues with them. I’ll go looking for some muriatic acid to use instead. How about the TA value and the impact on CSI? Is it a good idea to lower TA and raise pH keeping CSI slightly negative?

I’m having issues with what I think is calcium deposits, they are found on the bottom of the pool below the returns and on one of the steps. See photo After running the dolphin robot it’s filter was full of what I think is calcium deposits The pool is a 2 month old beadcrete in-ground pool...

The SWG did it, a friend came by Monday and tested FC as noted earlier in the thread, FC was holding at 7.5 as before we left. I left the acid automation on, it added 1.5-2 litres of sulfuric acid while we were away. I turned down the runtime of the SWG a bit today based on the FC reading...