I think some of the people behind Oaksterdam are frowned upon by the community for a host of reason that I am not privy to. When money is involved for profit feelings always get hurt. There have been some great, and legit cuts though to come out of Oaksterdam, including the XJ.
A bag of hydroton is cheap and is around $25 bucks. 12 Cap buckets require 2 bags of hydroton to fill. The worst aspect of growing hydro is the hydroton. Washing it is a bitch and no one likes to do it. In fact there has to be a good way to wash the stuff and you see threads talking about the problem.
I dont mind the cost of buying new hydrton every cycle, however, people bleach it or soak it in hydrogen peroxcide in their tubs. Sorry about my poor spelling. I would not re use it more then a few grows as its ionic properties will become effected from the nutes and salts imho.
One might dump off the top layer of rocks, clean those and discard those rocks bound up in the roots.
Many people grow coco because of hydroton is a pain to clean. There might be a brand that is dust free. If that is true then it is worth a shot to try. I have been meaning to order some.
With hydroton you rarely Drain To Waste, which is by far the best way to grow! Recirculating sucks, and I wish that I could drain to waste in hydron. Im working on some slow drain net pots that could be fill then drain over like 5 or 10 minurtes, this run off could then be drained off. I need someone who can mold plastic for a slow draining net pot design.
I change my resos as often as possible. Using Jacks Hydroponic Formula makes this cheap.
Here is a picture of what is called the kill line. Keep that shadow as close as possible to the canopy, as in just above it. Its too high above my plants! I had just raised my light when I took that picture. I was starting to spread out the bucket. If there is even light coverage across the plants and there is also no issue with heat or light bleaching , then the closer the lights are to the plants the greater the yield will be. If bleaching occurs, it is easy to see and you know that the light is too intense. In the Straw Mix Hydro Blast thread there is a group picture of all the plants in the 4 by 4 table. In that picture you can see just how close the kill line is to the plants. I want to stress the need to have even light coverage as best you can. Different hoods cover areas with light a little different. Buy a cheap light meter to check things out.
Every 12 inches doubles the lights intensity. More intensity = denser buds and bigger yield. An aircooled 400 watter can be placed literally 2 inches from the plants.
I also included are some pictures of the XJ, now almost 3 weeks into flower...also time to stake those branches. I find the Xj will need stakes or strings for support as the buds get big and heavy and the branches cant support all the weight.