Comment

Comment by Leo White Bear on October 2, 2014 at 8:57pm

Butch-

  I found that using the male and female adapters from the electrical conduit section in our home depot works very well.  The problem with PVC male/female adapters is the male has a bevel before the threads and getting these tight is near to impossible.   Look for the gray "plastic" units in the electrical dept. they fit my 3/4" - 1' PVC pipes flush to the bottom of the grow beds

Comment by Jeff S on October 2, 2014 at 7:07pm

Uniseal will be the cheapest option. http://www.aussieglobe.com/uniseal1.htm

Shipping is reasonable especially if you're ordering several seals.

Comment by Butch Pornebo on October 2, 2014 at 6:39pm

What is the cheapest way to install the bell siphon on the grow bed ? Bulkhead fittings and Uniseals are not in the budget right now. using 3/4" pipes and male and female pvc adapters does not quite work. it won't screw together tight without using a wrench. any suggestions ?

Comment by Derrick Kerr on September 21, 2014 at 9:00pm

If anyone here is in Maryland, I just created a group Maryland Aquaponics for open discussion about the difficulties specific to our area. Please join me and lets talk aquaponics.

Comment by Bob Campbell on August 3, 2014 at 8:38am

Rob do you out the green sand in the grow beds?  What would be a good amount to use in a system of about 500 gallons total water?

Comment by Jim Fisk on August 3, 2014 at 6:21am

Great advice Rob, haven't noticed it mentioned anywhere else. Thanks as always. Any more info on the "Minerals Plus"?

Comment by Rob Nash on August 3, 2014 at 5:23am

Jim, i believe most good garden centers have green sand. of course i get mine from Brite Ideas Hydro on S. Congress.  its good stuff.. has mag and cal and other stuff..

totally safe for ap, and does the job for long time.. i know a guy who only adds green sand once or twice a year and never has iron or mag issues.

but if you look at the minerals plus,, it has higher levels of everything.. so i use both of them now..

im doing some major iron test runs right now.. and will post my findings asap.

but go with the greensand, you wont regret it.

Comment by Tom OBrien on August 2, 2014 at 8:58pm

@Jack Dunbar - I have a similar indoor setup. For pollination I have been using an old electric toothbrush. It seems to work OK, and my plants set more veggies, although a fan may work just as well or better. I didn't have much luck growing tomatoes, but I only tried them once. Now that I have a better grow light, it might be fun to try again.

Comment by Leo White Bear on August 2, 2014 at 6:59pm

In my NFT setup, the pots are within 1/4" of the bottom of the troughs, just enough for the water to flow under and past them.  As long as the rafts are floating in the water, I really don't believe there is much of a minimum height.  I have seen rafts floating in 2" of water up to 6", I'm sure that there are those here that will suggest how deep their water is and I'm sure it works well for them. 

  There is not too much in aquaponics that is written in stone as everyone's situation is different.  Test which works best for you and go with it

Comment by Jeff S on August 2, 2014 at 4:29pm

Can anyone suggest a minimum depth needed for a raft bed?

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