Strider

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About Strider

  • Rank
    Senior Member

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  • Biography
    Retired US Marine after 30 years.
    Computer Science Degree from Hawaii Pacific University
    Electrical Engineering Degree from Kent State University.
    20 pounds overweight but still damn good looking.
  • Interests
    Aquaponics, scuba diving, golf,

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  • Location
    Hawaii

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  1. I imagine that only certain fish would survive in an IAVs system with intermittent airation. Maybe an airstone / pump would would be prudent.
  2. Hello from the Aloha State. When I was a teen one of my jobs was working at a nursery. One of my tasks was taking seedlings and transplanting them into greenhouse sand beds. After they grew a little they were potted and put outside. The sandbeds had sand and perlite. That is all. Anyway, I thought this was similar to what you were doing.... Maybe plant seedlings, wait, then add fish....? Any reason perlite cannot be added to tbe first 8"?
  3. Hi VKN. Resident troll here. Very nice video and setup. I was wondering why the fisk pond is so shallow? Looks like the fish can barely swim in the water.
  4. Yes, both systems simultaneously from one fish tank. Yes, trying to use one connected to the end of the other would present problems. Understand that I am not comparing the two systems as some inevitably do with each post they make, I am just suggesting another way to build. As Gary has said, fish production is not the goal of iAVs but why not run another system where fish production is the goal. Best of both Worlds...?
  5. Yep, he seems like a doer......I was thinking of his common problems, problems we have all faced as we designed and built systems...and it came to me that perhaps a hybrid system that runs a dual loop and a iAVs system may worth building. One (Dual loop) to keep the majority of the grow beds clean and the other (iAVs) to filter the fish tank. Let's face it not all crops grow well with out additives. That is where the dual loop comes in. But those things that do grow well in sand would need no additives....Gary, please don't scream at me that I don't understand iAVs because everything grows well in that type system...lol The experiment continues....
  6. I must have misunderstood Gary's meanong....probably the accent.. Well Daddy, I put a new in sump tank pump in my system to reduce the flow and eliminate the need to vent extra water. But it is still too much volume. I am running all on venturi tubes and leaving the air pumps for emergencies. I need to rebuild my RFF (add a cone bottom) and redesign my sand and gravel filter. Busy as Hell lately even working weekends but will try to post some pics Sunday.
  7. Laughter makes the world go round. Get me back? I never left.
  8. Lol, I rest my case.
  9. Also like to mention that I lost power for two hours and was in a panic. Although electricity outages are rare, they do happen here. So I ran an extension cord from my truck to my air pump in the fish tank. Reduced output but it did work. Guess I need to invest in a portable generator.
  10. Gary, this is a dusl loop thread, not an Iavs thread. I have read all of Mark's posts and comments. I was referring to the car parking stall sized systems, u know, the whole reason for developing Iavs....to enable poor villagers to produce crops and harvest fish cheaply. You have a very distasteful tendency to talk down to people. You need to work on that. One commercial sized study does not a validated system trial make. Enough of that... So I have now replaced my large external pump for a smaller in tank pump to hopefully lower water volume and use only venturi tubes for fish tank and bio filter. So no more air pumps. Should cut my electric bill and simplify things. The experiment goes on.
  11. Well, as interesting as those big commercial systems are with all their formulas and plumbing my system is as far removed from those as can be. Mine, like Mr. McMurtry's, is a small scale back yard endeavor only designed to work to my specifications. When it stops working to my specification, or maybe I should say expectations, I will change it. For now I am plugging away at the smaller problems like filtration and flow rates. Please keep comments pertinent. I don't really care if people disagree on types of systems and those systems worth, but keep it positive. Comparing, for example, Sand systems with dual loop, NTF, or other types is silly, as they all work if properly built and maintained. It is really a matter of preference. I mean really, what do I care if another system produces 20 times better? I can not eat what I am growing now at a hobby level. It is all irrelevent. My I suggest that forums be split between the small scale hobby types and the commercial types? Just a thought.
  12. Why isn't your system producing? Hang in there buckaroo! You are having a bad summer, first Bernie loses the primary and now this. Lol
  13. Hmmmm, is that your professional opinion? Lol.
  14. Well it has been a while since my last update. Sorry about that! So, I have been trying different ways to filter my water. I went with a felt sock type filter that worked well but required frequent cleaning; twice a day. The socks eventually degrade and need to be replaced. Then I went to a wedge wire / felt sock combination. That was OK but the socks still needed frequent cleaning and the wedge wire needed cleaning as well. So still a daily chore. Them I replaced the felt socks with a 74 micron basket. It fit into a 5 gal bucket. Still a lot of daily cleaning (probably should have went with a 200 micron basket) as did the wedge wire. I placed a conical bottom on a 55 gal barrel and filled the barrel with river rock, 3/4 inch gravel, pea gravel, and topped it all off with chicken grit. (crushed granite). While most of these so called birdman gravel and sand (G&S) filters feed water from the bottom working its way up and out the top into the sump tank, mine gets its water from the top and works its way down and out the bottom of the conical bottom into the sump. It does have the customary backwash plumbing tgat uses a shop vac to dislodge the waste for cleaning. Cleaning is every three days. So far I have observered several issues. First, my drain is too small and needs to be increased to a 2 inch size. My pump my be a bit much as well. The pros are very clean water. Crystal clear! Also less frequent cleaning times. The con is it uses more water to clean the sand out. But I can say that of all ways I have tried this is by far the best. I will work on a video to show it hopefully today! Cheers all!