Aquaponics Kits – an Interesting Question

by gary on February 16, 2010

Are aquaponics kits a rip off?

This is the question posed by TreeHugger’s Sami Grover in response to Hawaii-based Friendly Aquaponics’ announcement that they had produced plans and operating manual for a micro-aquaponics system…..for just US$49.95.

Friendly Aquaponics claim that their plans and manual arose from concerns about the cost of kits offered by competitors.

Sami Grover quotes Friendly Aquaponics…….

”We were offended by the many sellers on the web who are taking advantage of people’s relative lack of knowledge about aquaponics to sell them overpriced collections of standard tanks, pumps, and piping called “aquaponics kits”, that can usually be purchased locally for a fraction of the cost. If we’d seen even ONE such “kit” that was reasonably priced, that ALSO had realistic claims about how much can be grown with it (the other problem we have with these people), we wouldn’t have bothered with this set of plans.”

The articles continues with the claim that kits costing $3,000 can be built as DIY projects for as little as US$500……using Friendly’s micro-aquaponics plans.

The TreeHugger article came along at an interesting time because I’ve had similar questions about aquaponics kits.

Some of the issues that attach to aquaponics kits include:

  • The claims about their capabilities.
  • The “technical” advice provided with the kits.
  • The quality of the components.
  • The cost of the kits.

As with anything, claims as to the performance of aquaponics systems should be treated with a big dose of caveat emptor.

Take my home state, for example.  Currently, Queensland is hot, very humid and a favourite holiday destination for many sap-sucking and leaf-eating creatures…..so growing any plant is a challenge at the moment.  In three months’ time, we’ll be in full flight and able to grow almost anything just as the rest of the country descends into winter.

There are so many factors that influence the growth of fish and plants that generalised claims – about the amount of fish and plants that can be produced – are worthless.

If predicting the amount of produce that a particular system can produce is an issue then, given the unpredictability of the marketplace, attempting to estimate the financial value of such produce is even sillier.

Talk about the return on investment (ROI) in such situations should be afforded the same credibility as fortune cookies.

The adequacy of technical advice is another issue.  The “just add water and shake” approach of some kit distributors will produce a similar outcome to giving car keys to a toddler……they may make it go but they’ll quite likely kill things in the process.

The quality of components can be an issue, too.

The first test of a tank or grow bed is that it should hold water and (as strange as it seems), I’ve encountered fibreglass tanks and grow beds that failed this basic test.

One such tank that I saw had fourteen holes in it.  Now, one hole is sloppy craftsmanship but fourteen holes is a sieve.

I’m not concerned about the cost of kits per se.  In my view, people who produce a good product are entitled to a reasonable return on their investment of resources…..and there will always be those (asset-rich but time-poor) people who are willing to pay for the convenience that kits offer.

To summarise……I don’t have an issue with kit distributors who provide quality products with sound operating instructions and a realistic assessment of the kit’s capabilities.

Where these things don’t happen, then the answer to Sami’s question is probably in the affirmative.

In any case, the absence of wealth shouldn’t be a barrier to producing clean fresh food for one’s family…..so DIY options like those offered by Friendly Aquaponics are important.

-o0o-

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Safety in Aquaponics

by gary on January 23, 2010

Interest in aquaponics grows daily.

Thousands of people throughout the world debate the various aspects of this wonderful phenomenon on a growing number of discussion forums and there’s hardly a day goes by when a new book, kit or other product doesn’t hit the market.

But there’s an elephant in the room that no-one’s talking about.

It’s SAFETY!

In terms of people safety, there are two main risks that attend aquaponics systems…….drowning and electrocution.

Several years ago, I pioneered the use of access barriers in aquaponics systems.

One of the reasons I favour square or rectangular tanks is the ease with which they can be covered to prevent entry by curious toddlers.

Access barriers keep toddlers and pets safe.

Access barriers keep toddlers and pets safe.

While access barriers are more widely used than they used to be, there are still far too many systems that are not adequately secured against entry by small people.

If a tank can’t be covered, it must be placed behind a child-proof fence or locked inside a shed.

Nothing will diminish the positive atmosphere that surrounds aquaponics like media headlines about a drowned child.

While small children are those most at risk of drowning in an aquaponics system, electrocution is rather less selective – it will kill anyone.

Electricity - an excellent servant but a cruel master.

Electricity - an excellent servant but a cruel master.

I have seen hundreds of aquaponics systems and many of them have one thing in common……… a foolish disregard for electrical safety.

I’ve seen extension cords running across thoroughfares where they risk damage from being walked or driven on.  I’ve also seen plugs suspended over fish tanks, or lying near puddles, and  I’m aware of people who have built equipment or performed work that should have been done by a licensed electrician.

Don’t get me wrong.  This is not about you…..it’s about us.   This post was largely prompted by a self-audit of my own systems that suggested that I needed to lift my own electrical safety game.

A Clipsal Portable RCD Power Outlet is on my shopping list and a commitment to being smarter around electricity was prominent on my New Years’ resolutions list.

Let’s all commit to a better, safer way of doing things in 2010.

-o0o-

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7 Good Reasons to Remove Solid Wastes.

January 13, 2010

The accumulation of particulate wastes in an aquaponics system (which largely comprise faecal matter and uneaten feed) will negatively impact your fish in a variety of ways including:

Solid wastes may clog bio-filters and reduce their operating effectiveness.

Particulate matter consumes oxygen during decomposition which means that there is less oxygen for the fish.

The presence of solid wastes encourages the growth [...]

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Taking Advice

December 14, 2009

The enduring model of skill formation is the apprenticeship system.
It has served humanity for thousands of years and it is the means by which people most effectively develop the skills to do all manner of things including making bread, brain surgery….and aquaponics.
The apprenticeship system comprises three essential elements:

apprentices – whose job is to learn the [...]

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Mythconception #8 – Water Turnover

December 11, 2009

One of the more recent aquaponic myths to circulate is the one that says that the contents of the fish tank must be turned over each hour.
It’s another one of those quaint notions that defies logic.
The fact is that the frequency with which the contents of a fish tank must be turned over are driven by [...]

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Mythconception #7 – Grow Tank Depth

December 8, 2009

Here we go again, the myth makers are at it again. 
This time, it’s grow tank depth for raft systems. 
The suggestion is that grow tanks should be 300mm (12″) deep…..and some of the reasons being proferred for this depth include:

the more water in a system the greater its stability.

shallower tanks may heat up (or cool) down quicker.

shallower [...]

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Vermiponics – Aquaponics without Fish

December 6, 2009

Aquaponics is great.
And the flood and drain model is particularly interesting…..and useful. 
But what if you wanted all of the benefits of aquaponics but none of the complexities of rearing fish?
Or what if you can only grow fish during a particular season?  What do you do to keep your plants going during the off-season?
Well, there is a [...]

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15 Good Reasons to Have a Trickling Bio-Filter

November 21, 2009

Biological filters are the means by which people like you and I are able to grow our own fish.  In short……no bio-filters; no aquaponics!
Bio-filters are simply good places for nitrifying bacteria to live and play.  They provide the optimum environment for the bacteria that convert the potentially toxic wastes produced by the fish into organic plant [...]

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Mythconception #6 – Aquaponics is Easy

October 26, 2009

There are some people who would have you believe that operating an aquaponics system is just…..easy!
The  people most likely to tell you that aquaponics is easy are those who want to sell you aquaponics kits or equipment – so their interest is fairly obvious.  You’re much more likely to sell something to someone if you [...]

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Mythconception #5 – Sustainability

October 22, 2009

We often seen the word sustainability used in conjunction with aquaponics but just how sustainable is it?
Water use efficiency and the absence of herbicides and pesticides are powerful arguments in support of sustainability…..and so is the conversion of fish wastes into plant food.
But these are only part of the picture.
Any notion of sustainability has to acknowledge the following:

The use of wild catch [...]

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