Perth Aquaponics.com.au #aquaponics
Well the spider mite are back... with a vengeance!!!
I thought I'd gotten rid of them a few weeks ago with removal of the coriander, the worst affected plants, and the light spray of Neem, but it would appear that just sent them into hiding... where they spent their time planning their comeback and subsequent world domination... well, IBC system domination at the very least... which they've achieved, every plant in the system is riddled... the peas, strawberries, lettuce, rainbow chard, even the thyme.
Speaking of thyme... I think it's thyme for some IPM... some predatory persimillis mites... (y)
P.S... It's much better viewing if you expand the video out to full screen.
Perth Aquaponics - Silver Perch Fingerlings 04-12-13
The Silver Perch fingerlings have been in a week and a half now and are feeding very well. They are also getting used to me approaching the tank.
I'm currently feeding 3 times per day and gradually increasing the amount I feed them... just trying to find out how much these little guys will actually eat. I'm quite amazed at how much feed they can put away in one sitting.
I've been testing the Ammonia levels every few days just to ensure I'm not over feeding, I haven't had even a trace up to this point... all is going well.
Dispatching Fish Quickly and Humanely
Video: Dispatching Fish Humanely... Not for the squeamish!
Being the end of Trout season I've been asked a number times recently what is the quickest, most humane method of dispatching fish. I have included this video to demonstrate my preferred method, here's the description:
1. Position the point of a sharp, sturdy knife blade, cutting edge facing forwards, into the centreline of the head about 2-3cm behind the eyes.
2. In one movement force the knife down into the head then tilt it forward towards the front of the head until level with the eyes. The fish's body and tail will spasm for a split second then the fish will go limp... completely dead before you've even finished the procedure.
3. Once you've dispatched the fish, immediately roll it onto it's back and slice through the fleshy bit at the bottom just behind where the gills join on the fish's underside, slice through to the gills. If done correctly you'll see a small squirt of blood coming out with each beat of the fish's heart. This will "bleed" the fish out and help maintain optimum freshness and taste.
4. Then gill and gut the fish, remembering to remove the kidneys (the black bit along the backbone on the upperside of the gut cavity) as per our October 16 post below. This will provide the freshest, least stressed, tastiest fish.
Where's the mop?...
Aquaponics... Is it technical, or difficult?... Does it require a lot of maintenance?
These are questions we get asked occasionally and my answer is: No!... After the initial set-up, cycling and establishment period (usually about 2-3 months) there is very little involved in maintaining a healthy aquaponic system... much, much less than a traditional soil based veggie garden.
A simple pH and Ammonia check once a week is about as technical as it gets... and maybe adding a very small amount of Lime if the pH needs adjusting up.
The extent of the maintenance may be as simple as once a week turning the gravel guard surrounding the siphon (if your system has one) to stop any roots from growing into the siphon.
Then there's feeding the fish... a handful of fish pellets twice a day, but even this can be skipped for a few days, if need be, with no detrimental effect to the health of the fish. Their bodies work differently to us warm blooded animals and they will quite happily go with out a feed for a few days while you go up the coast for a long weekend etc.
In fact my biggest maintenance concern at the moment is mopping the shop floor after feed time!... :-D