Aquaponics Venturi adjustment

I thought Id make a little adjustment to my venturi as suggested by Mike Creuzer in a comment on this post on my Venturi air thing.

He thought I should have some extra bubbles breaking the surface, and it turns out its a bit of a hot topic in great debate all over the place, but I noticed a very slight oil slick on the surface of the water. I guess lots of things case very slight oil slicks. Eucalyptus leaves for one. Uneaten fish food probably would. I suspect an oil slick - and Im talking an almost invisible one - would have some effect on gaseous exchange between the atmosphere, and my fish tanks water.

I have no idea if thats true, but I figure it couldnt hurt to stir the surface a little.

So I trimmed the pipe carrying water and bubbles down to the bottom by an inch or so and now lots more bubbles exit.

A 1/4 second exposure shows how much extra water movement on the surface is actually going on.










After only a few seconds there was no more sign of the oil slick.

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Aquaponics New system at two months

In a couple of days my new system will be two months old.

I wasnt sure how it would go being on the wrong side of the house and in shade for all but a couple of hours a day, but it looks like it might be ok.

This is the original empty growbed two months ago.

And now it looks like this.

The lettuce in the foreground went in as store bought seedlings, and the rest was from seed, but I wasted a lot of time before I actually sowed them.

We have started harvesting leaves from the lettuce and within a week or two we should be picking rocket as well.





The growbed is around two metres long and a little over a metre wide, so it should keep us in salad greens with ease.

Ive also planted a few sugar snap peas at the back because I like to eat them when Im doing anything with the garden. Theres not enough to harvest but I enjoy picking something and eating it at the growbed.

Also at the back Ive planted quite a bit of basil, some coriander (cilantro), and a few other herbs.

Thats all. Just a quick update.

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