It has been sometime since I last tried Crawfish, that time I was not ready and don't know what to expect of this crustasean . With some time to spare this afternoon and many surplus tanks and pipes, I decide to make a tank for it and at the same time making a small 15 mm siphon to test. Killing two birds with a stone.. as they said it.
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I am using existing water source to water the new addition and right return tank as support. Surplus Dickson bars or angle irons make a rack using return tank as support. This arrangement make the distance for water return to be very small. It will be difficult to make a siphon.
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Using one of the surplus smaller tub which already has holes in it for water inlet and previous 25mm siphon. The 25 mm siphon I use a tank adapter and pvc piping to make a stand pipe since I am not using this siphon, it is just to close the hole.
The other hole was for 15 mm pvc piping, this is just right for the smaller siphon I am testing. I made this siphon same as the 20 mm StrainerBell just that it is using smaller parts.
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The shorter return creates problem with existing fittings, I had to cut it to length so that siphon outlet just above water line in the return tank.
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For now I'm setting the siphon to operates at water height of 11 cm, no extender use. I do not want to use too much water since there is no hydroton in this tank. I think Crawfish don't need that much water, and having a flood and drain can keep them continuously supply with fresh water.
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This siphon will drain water to about 2 cm, it is preset that way due to the vent on the inverted vent cowl used. BTW it is a 2 inches vent cowl and uPVC pipes, the 20 mm Siphon make use of 3 inches uPVC.
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That's the 11 cm water mark, hope Crawfish will not manage to escape.
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Water inflow is a trickle, and I "tee" from existing feed to the right growbeds on my CRAFTS set.
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That's the completed 15 mm StrainerBell siphon and water feed.
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Outlet flushing, I will need to test these. Since it is smaller the operating margin is much less. Water required is also very much less, making this siphon a good candidate for a gutter growbed system.
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The completed crawfish tank with smallest siphon I made to test.
Next I will need a few Crawfish... :)
The other hole was for 15 mm pvc piping, this is just right for the smaller siphon I am testing. I made this siphon same as the 20 mm StrainerBell just that it is using smaller parts.
Next I will need a few Crawfish... :)