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Discussion Starter #1
Hey all,
I'm working on my sump plumbing, and making some decisions about what types of plastics to use. I got my kid sister to teach me a bit about the diff types there are, and I've pretty much got my head around the BPA's, HDPE's, and PVC's and XYZ's. But along the way, I've read a bunch of scary Internet nonsense too.

Any volunteers to point your TDS meter at the ATO reservoir before and after your Ro/Di sits for a bit?

obvs hormone disrupters are unlikely to show, but I'm curious about any leaching. The horror stories are all about tanks that aren't thriving where they found phos, or nitrates coming out of the storage and mixing containers. I'd like to know what a happy tank reads cause the simplest explaination is they used it for tap water or something and failed to mention.

Thanks!
 

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I have no ato, but I do make 40g of ro/di ata time, my last 5g bucket sits for about 2 months before I finally crack it open and its still 0 tds, I use pickle buckets from my work to store my ro/di. I don't think you will have a problem as long as you use food grade plastics, maybe after years of using them as saltwater is harsher then other things, but im not too sure on the longevity of food grade plastics and saltwater.

also, if you have open containers (put 5g in your ato without it covered) im sure its bound to catch stray particles that could attribute to your tds results
 

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Yeah, im going to use the big jugs that fryolator oil comes in probably, they are like milk jugs. It's funny though, haccp certified food grade plastic is a pretty low bar. They don't account for BPA but like, nobody would buy a water bottle that has it.

Know what else is cool? The same plastic that cd cases used, the really brittle front covers that always cracked (I'm dating myself here ;) ) is basically styrofoam without the air in it. Weird, huh? It is a more dangerous one, but still common for food.

I figure if the cost is same, might as well use what I would drink out of. Like I'm avoiding PVC cause you aren't allowed to plumb your house with it, why would I pass the tank water through it 100's of times a day? But everyone does, so it's prolly not that bad.

Google anything long enough and someone will tell you it's deadly, right? I was curious how those horror stories match up with TRT tanks
 

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Lots of PEX tubing is being used to replace copper for potable water, but I'm not sure if PVC fittings are compatible.

If science comes up with a warning of PVC in marine tanks, the hobby is in for surprise.

[This is 20 yrs ago] Our milk inspector made us change a 3/4" piece of PVC that was part of the wash equipment in the milk house sink. We have to use some other kind of plastic, but I don't remember what it was. He claimed that bacteria growth and it was a carcinogen. We had the dairy supply guy change it.
 

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Discussion Starter #5
Lots of PEX tubing is being used to replace copper for potable water, but I'm not sure if PVC fittings are compatible.
It's diff fittings, they are like the barb kid you use for tubing. ABS plastic I think.

If science comes up with a warning of PVC in marine tanks, the hobby is in for surprise.
Borneman did a bad one... even people who usually listened to him didn't buy it *ducks*

[This is 20 yrs ago] Our milk inspector made us change a 3/4" piece of PVC that was part of the wash equipment in the milk house sink. We have to use some other kind of plastic, but I don't remember what it was. He claimed that bacteria growth and it was a carcinogen. We had the dairy supply guy change it.
Yeah, state codes vary but you mostly can't use it inside. Lots of wells run it up to the foundation, then switch to copper or cpvc. Heat and uv are sposed to make it volatile, but idk how warm is ok. I have a bunch of pex left over from plumbing the Rutland house so might as well use it.

Anymore volunteers?
 

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No ATO here either but I store RO/DI in 30g Rubbermaid Brute cans. Last batch is a couple months old and still zero TDS.
 
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