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 PTC Ceramic Heaters automatic temperature control - can set temperature no light   no fire dangers --- safe -- than Mica heater ... air dryness problem due to fan -- than Mica heater  place water in tub slow heating ..  safe https://amzn.to/48ZyEEu https://amzn.to/4oOLGJw https://www.youtube.com/watch?v=ShJsyhmDo-Y PTC wall heaters https://amzn.to/3JCA9Oo https://amzn.to/47mV01o MIca heters.. temperature settings as only 2 settings of thermstat fire safety no safe as ptc no dry ness.. no fan no noise.. quic heating  https://amzn.to/3LkpLeK

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  So dium dichloroisocyanurate (SDIC) - 60% clorine costly  SDIC has lower chlorine content, dissolves quickly, and is ideal for rapid, immediate disinfection SDIC is more pH-neutral fastly mixes with water safe for houses and drinking water https://amzn.to/4h0avQ2 Granules - 1039/- per kilo Trichloroisocyanuric - 90% chlorine (TCCA90) cheap TCCA has a higher chlorine content and dissolves slowly for continuous, long-term disinfection  TCCA is more acidic, potentially lowering pH - need to adjust PH over time long time to mix.. for long time protection https://amzn.to/4pUWBm9  Tablets- 200Gram each -1kilo -- 456/- https://amzn.to/3IVzkQs Granules- 453 Gm - Rs.353/- (779.2 per kilo) https://amzn.to/4nMLCK0 Granules - 1 kilo -722/-  10 kg - 4750/-

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