Backyard Aquaponics
A place to discuss aquaponics

What are people's opinions on solids separation for this system? Is solids separation needed for a system like this with two flood and drain grow beds?

There is 0.75m3 of scoria in the beds.

Solids separation would allow the pumps to go in an adjacent sump instead of the tanks.

Water tested, ph is 7.5, ammonia, nitrites, nitrates all zero

Poured in some more sea sol

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From the colours, ph 7.4 - 7.6, ammonia somewhere below 0.25ppm, nitrite around 0.25ppm, nitrate 5-10ppm

are you cycling?
Your ammonia is very low.
another week and the nitrite will disappear

Systems been filled and flowing for about five-six weeks

I did just pour in some sea sol a few hours ago. I've just gone and looked at the sea sol bottle. I think it's over 200ml that's gone in since the systems been up.

If you have nitrites then your system isn't cycled or you're over feeding.

My systems took 2 weeks in summer and 4 weeks or so in winter.

Hmm OK. I'll test again tomorrow.

Anyone have a good place to get fish in Townsville?

Great system. I've been looking over outdoor systems, as that is stage 2 for us. Your system look sharp. I especially like the teeter-totter flow switch. Great job!

You would be adding unnecessary complication. unless you over-stock the fish you will not need solids separation IMO.

with I guess about 400L of filtration (wet media) in your GB you should be able to handle up to 20 fish.

Groovy water switching valve, nice work. have you considered using a tougher hinge?
maybe an SS shaft drilled through the end fittings?