I am considering buying a roll of 800 gauge high density polyethylene to line my growbeds, is 800 gauge heavy enough? i'll be using pea gravel as grow media,a roll of (HDPE) is very expensive, i want to use plastic or rubber pond liner but i was concerned about the plastic leaching into the water!, does rubber leach? would leaching in ap systems gb or ft liner's hinder AP farmers from obtaining an organic cert?. thank you.
If you are going for the low maint media based systems then the HDPE is probably the better choice as from my understanding (and I'm no expert on this) but the HDPE #2 plastic is pretty darn safe as far as plastics go. It tends not to have as many of the plasticizers that leach and act like hormones in the body (but that is really hearsay on my part as I've had trouble finding hard core facts on the subject.)
I think there is a large bonus to growing food at home cause you are eating it really fresh which preserves huge nutritional value and you can grow varieties for taste and nutrition rather than shipping and looks in the store. And of course growing foods without pesticides and herbicides sprayed all over them protects you from huge amounts of chemical ingestion. (Keeping in mind that many of the chemicals that people are freeked about leaching from plastics are very similar to some of the chemicals being sprayed on our food daily as pesticides and herbicides. It might be hard to know if we are getting those chemicals from the plastics the food was packaged in or if it was the byproduct of the chemical sprayed on them or even a byproduct of the GM modified plants themselves here in the USA.)
Anyway, good luck in the research.
There are so many variables when it comes to nutrition and taste the generalizations are probably not very helpful (it's like statistics, you can find numbers to prove just about anything so long as people don't examine the evidence too closely.)
But much of the food that is shipped thousands of miles is picked very early so that it can arrive at the destination before rotting. This often has a negative impact on taste with many types of fruit.
As for packing on the nutrients right before bolting, I don't know about that one and there are many lettuce types that do become more bitter as they get mature and most do definitely get bitter once they have bolted to seed. I don't think growing in soil or ap really changes that one. Many people do prefer the texture/flavor of baby lettuce and other baby greens so that has become quite the specialty item. Again, is it any healthier one way or the other, I don't know.
I can say it is healthier to eat very fresh foods and if you are growing your own you have more variety to choose from with also improves things. You can choose to grow things for taste and nutrition instead of saleability and shelf life. Eating fresh foods is very good.
EATING FOODS YOU GROW YOURSELF has added value that you will only really know/understand once you have done it yourself. THE EMPOWERMENT OF PRODUCING YOUR OWN FOOD is immense.
Let me say that again
THE EMPOWERMENT OF PRODUCING YOUR OWN FOOD
That one reason is enough for me to continue doing this even if all the others were moot points.
Hi Kevin, I belive I read at Friendlies Aquaponics site (Hawaii USA).....that rubber liner would not be able to get an organic rating.
Friendlies use the covering/sheeting thats used for green houses. They managed to get an organic rating. Maybe Chris will be able to tell you exactly what they use ?
Ok, I found a link...look at the 4th, number 7 question. The question starts out....Where can I get some net pots in large quantities... In the answer, they say what they use.
They do make PVC pond liner. I don't know if it would be 'organic'. It may be cheaper then the HDPE.
I'm curious to see what others say...?
Pea gravel may/will plug pretty fast. I've been reading where 3/4 inch grow media is recommended.....at least 1/2 inch. Hydroton is at least 1/2 inch (?)
Good luck...looking forward to seing some pictures of your system !
Hi Kevin, while I'm new to aquaponics, I have nearly 20 years experience in Koi Pond husbandry. Rubber liners are used extensively in Koi Ponds, and many EPDM lined ponds house some VERY expensive Japanese Koi. I think you could be confident that "Firestone 45mil Pondguard" will serve you very well and can be patched if torn, which polyethylene can not.
Hi david, thank's for that, is it true that koi are like dog's when it comes to human's?, in that they like our company.
David Jones said:Hi Kevin, while I'm new to aquaponics, I have nearly 20 years experience in Koi Pond husbandry. Rubber liners are used extensively in Koi Ponds, and many EPDM lined ponds house some VERY expensive Japanese Koi. I think you could be confident that "Firestone 45mil Pondguard" will serve you very well and can be patched if torn, which polyethylene can not.
Question about PVC, used as plumbing in the systems - not the liners, is this allowed in an organic system? I thought that PVC plumbing was only allowed in the states as a waste water only application as it was not fit for potable water?? I know that PVC row crop covers are not allowed in Organic Cert. farms. Does anyone know about PEX for supply lines?