I love this time of year
by
, 10-26-2014 at 07:20 PM (7415 Views)
It's around this time of year that I watch the TDS of my RO unit drop. I'm talking about the output of the RO system before the DI stage.
Whenever I turn on the RO/DI system, which is twice a week, I open a valve before the DI stage and let it run for 90 seconds. By avoiding TDS creep, DI resin lasts longer. Link: http://www.reefaddicts.com/content.p...thy-of-concern
Once the water is flowing, I'll turn on the TDS meter to observe the numbers rise and fall. During that first minute, I'll watch the number ascend to nearly 200 and rapidly drop back down to the normal operating reading. Over the past seven months, it's been around 23 coming out of the RO membrane but as we head toward winter, that number drops. Today, it's coming out at 10. The benefit of the lower TDS is that the DI resin will last longer, and who wouldn't like that?! Last winter I saw the TDS drop to 6 before the DI stage, so that cartridge lasted a good long time polishing the last of the TDS to zero. Why the change? The city is no longer adding stuff to the drinking water during the cooler months, basically.
In other news, my Tiger Cowrie came right out into the open yesterday for a photo op. Link: http://melevsreef.com/blog/tiger-cow...ghted-10252014