Backyard Aquaponics
A place to discuss aquaponics

BPA is usually used in food and beverage packaging to protect food from coming in contact with metal... and may also be found in drinking vessels, polycarbonate plastic baby bottles, plastic tableware and the internal coating on tins.

Food grade plastics HDPE... are not polycarbonate.... or metal...

And the daily tolerance standards set... basically mean that a 9 month old baby would have to ingest about 1kg of BPA per day... to reach the TDI...

And Pthalates are generally used to soften PVC.... and have been discontinued in such applications in most major countries...

Diet is believed to be the main source of DEHP and other phthalates in the general population. Fatty foods such as milk, butter, and meats are a major source.

Exactly, by who?
Maybe a heavily 'influenced by chemical company' organisation? Maybe

And what is TDI ? Tolerable daily intake (TDI) refers to the daily amount of a chemical that has been assessed safe for human being on long-term basis (usually whole lifetime)
Did asbestos have a TDI, what about Radium, which was used in toothpaste and other body products.
Maybe TDI is as useful as RDI for food. Which is as useful as a chocolate teapot.

exactly my point, govt organisations working for the benefit of all.

In reality, everyone should do their own research and make their own informed decisions.
Why take the risk if there are credible possible risks identified ? Don't just trust some fat bureaucrat to decide on a "safe level" so you don't have to think about it.

True, and fair enough...

But "plastic aint plastic Saul"... HDPE plastics are totally different from PVC, polycarbonate, PET etc...

Totally agree, all very different and it would pay to know what we are all using/buying.

By the way, what are the blue barrels made from? and the IBCs ?
The worst part of our systems is probably the PVC piping...

nope

Like I said, everyone to there own. My kids dont eat from my AP cause they wont eat vegies or fish (little buggers), but this thread could go around and around. You can wrap your family up in a ball of cotton wool and hide them from the nasties of the world but the truth is its a harmful world out there..

*What about pesticides in food you have been eating for probably as long as you have been alive.
*What about passive smoking.
*What about exhaust fumes that you breath every day.
*What about non food grade containers you use to eat from, microwave in, drink from.
*What about alcohol you drink.
*What about the chemicals/oils you get on your self from servicing a car, checking oils, changing coolant. Think of the mechanics out there.
*What about degreasers we use.
*What about aerosols we use.
*What about the germs and disease when travelling over seas.
*What about the toxins that are produced from processing plants.

I could go on and on and on. Do I want to harm my family? Of course I dont! Ive worked 18 years in the mining industry and I live in a toxic and harsh world, I want a sparkling environment for my children but the reality is its not so perfect.

Looks like my days are numbered Charlie, can tick most of those things, with the odds against us I probably won't see fifty
I trusted that the fish are good indicators of what is safe and I must say I do not live in fear or spend my life worrying endlessly about what could go wrong, just try to do my best to do the right thing.

feel free to elaborate My comment was an unfounded guess, due to lack of googling powers today..

Thought this link was interesting enough to post. Still looking for more info though...

Chemical Chart For Tanks

Edit: And another...
Definitions of Plastic Terminology

Still haven't found what I'm looking for though...

What have i gotten myself into here?

The Hisory of Plastic

I'm supposed to be working... but it's so interesting!

Here's another:
How do I know what type of plastic is used for a certain application?

Still haven't found what I'm looking for.

I have some IBC's that used to contain truck wash and some that contained window cleaner.

I intend to paint them on the inside with potable water tank paint

I don't think that the detergent or plastics will be a problem, but I would like piece of mind when I give food from my AP system to other people.

@mitchamus - The plastic on my IBCs bow out when gravel/water is added. The bowing wouldn't crack the paint would it? Just throwing it out there.