Aquaponic Gardening

A Community and Forum For Aquaponic Gardeners

David E Harnish
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  • Hayward, CA
  • United States
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Lowering pH

Started this discussion. Last reply by Sylvia Bernstein Nov 28, 2013. 2 Replies

My City water is "off theChart". I have usedpH down to bring it within reason, but just noticed the pH down uses citric acid among other things. I have read somewhere not to use citric acid as it…Continue

Timing for drain and fill

Started this discussion. Last reply by Jennifer W Martin May 30, 2014. 30 Replies

I have seen numerous recommendations for how long to take to drain the beds, and then for refilling them. Is it appropriate to have the pump running all the time, and control the flow into the grow…Continue

 

David E Harnish's Page

Latest Activity

David E Harnish replied to anthony tran's discussion Where do I purchase my plumbing? in the group Sacramento Aquaponics
"Are you asking about the valves, or the seal in the tank where the pvc goes through? If it is the seals, use UNISEAL, available on AMAZON. Just Google it.They work very well. Dont drill your holes until you get the seals. For better water flow, I…"
Nov 3, 2015
David E Harnish replied to anthony tran's discussion Where do I purchase my plumbing? in the group Sacramento Aquaponics
"Where do you live?"
Nov 3, 2015
Jennifer W Martin replied to David E Harnish's discussion Timing for drain and fill
"I started my fish in Los Angeles last March. The fish did great through the summer and into fall. Once water temps hit 65 regularly, about late Oct, I brought them indoors into a 60g tank. The house is kept around 70 so while its cooler than they…"
May 30, 2014
David E Harnish replied to Matthew Schoen's discussion New Member, First time post in the group Sacramento Aquaponics
"Thanks, Can you post another photo from the top looking straight down?   I am curious about the "T" in the top which seems to be above everything.  I guess the bottom line with the red handled ball valve is from the pump in the…"
May 26, 2014
David E Harnish replied to Matthew Schoen's discussion New Member, First time post in the group Sacramento Aquaponics
"Can you Please,give some more information on the swirl filter?  I spent a lot of time and water in washing the media, but still get the sediment. Thanks, David"
May 26, 2014
David E Harnish replied to David E Harnish's discussion What happened to my Nitrates? in the group Sacramento Aquaponics
"I have been using an industrial strength pure ammonia, no perfumes or addatives. I added 30ml at a time and run it through the system and check again."
Feb 28, 2014
Tim Pinson replied to David E Harnish's discussion What happened to my Nitrates? in the group Sacramento Aquaponics
"Hello David, The Nitrogen cycle is actually a little difficult to "catch" in the tests.  This is because it is a cycle, so the levels with quickly rise and then quickly fall again as the bacteria do their job :-).  I get pretty…"
Feb 28, 2014
Casey Haas replied to David E Harnish's discussion What happened to my Nitrates? in the group Sacramento Aquaponics
"Hi David, I don't think you need to start all over. I have been running my system for almost one year now and have never once had measurable nitrates, not even during fishless cycling. At one point I even tried feeding…"
Feb 28, 2014
Paul Trudeau replied to David E Harnish's discussion What happened to my Nitrates? in the group Sacramento Aquaponics
"David, You say you've been cycling the system, with no fish.  What has been your source of ammonia? Paul"
Feb 28, 2014
David E Harnish replied to David E Harnish's discussion What happened to my Nitrates? in the group Sacramento Aquaponics
"Hayward water is very high ph, and I have been bringing it down with vinegar.  Could that have contributed to the problem? David"
Feb 27, 2014
David E Harnish added a discussion to the group Sacramento Aquaponics
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What happened to my Nitrates?

I had been cycling my system for several months waiting for the weather to moderate before adding fish.I thought I had the optimum balance, but hadn't tested regularly, and now upon testing find ammonia and nitrites are around zero, but so are nitrates.How do I start all over. I have two of the three grow beds planted (sparingly).I want to add fish after the March 15 fish sale.Thanks, DavidSee More
Feb 27, 2014
TCLynx replied to David E Harnish's discussion Timing for drain and fill
"FYI guys, the Aquaponic Indexing valves do require the flow to the valve to stop and start in order for those valves to index.  they also require a fair bit of flow and pressure to operate. Rob did once upon a time build a motorized indexing…"
Feb 19, 2014
Scott Roberts replied to David E Harnish's discussion Timing for drain and fill
"Jim - Can you keep your political rantings contained? Kinda off-topic and not helpful."
Feb 19, 2014
Jim Troyer replied to David E Harnish's discussion Timing for drain and fill
"@ David the valve is plumbed from one source (pump) to many outlets (grow beds); the valve is on a timer and advances from outlet to outlet on a schedule you set/select. Be sure to salt bath those farm fish to kill any pathogens they may be…"
Feb 19, 2014
Scott Roberts replied to David E Harnish's discussion Timing for drain and fill
"Freshwater Fish Company near Sacramento has "open days" where they sell to the public. Next one is March 15th, I believe. I may be going there by appointment this weekend - let me know if you want me to pick something up for you. In…"
Feb 19, 2014
Glenn replied to David E Harnish's discussion Timing for drain and fill
"Jim, I'm pretty sure that all states and municipalities have laws written to protect their people's interests from invasive species. Even Arizona has this List of aquatic invasive species signed as their game and fish director's…"
Feb 19, 2014

Profile Information

How did you find us?
Search engine (Google)
If you found us through a search engine, what search words were you using?
What to feed fish in aquaponic gardening
Are you an aquaponic gardener already?
No
If so, what type of system? (pick all that apply)
flood and drain media, none of the above
How old is your system?
Just started
How big is your fish tank?
3 IBC totes cut roughly 1/3 x 2/3
Name a part of a fish (spam blocking question)
dorsal fin
Please tell us something else about yourself.
Had a soil garden taken over by city ROW, but like my own fresh vegetables.

Comment Wall (1 comment)

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At 4:47pm on October 15, 2013, Robert J said…

David,  Its generally best to thoroghly rince your media before putting it into your growbed.  If you've already contaminated your main fish tanks, then you might be ok if you run your system for a while--but you may find a water change in order.  Btw Coir is coconut fibre.  As for hydroton floating, it will generally float 24-48 hours.  I rince mine, soak it and then drain it and add to the media bed.  If you're just starting, you have plenty of time.  If you're fishless cycling, the ammonia may well clean up your water for you, if not, then a water change is your best bet.  Any bacteria you've grown should be fine through the water change.

 
 
 

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