Fish behind bars?

[Georg Parlow]

Hello everyone! I am greeting you from Vienna, Austria.

I am still in the final stage of constructing my first system (1800 liters CHOP2), and I am wondering how you people with CHOP systems and pump in sump keep your fry from spilling over into the sump?

Best regards,

Georg

[Verna Gross]

We have a PVC slotted strainer on top of our overflow pipe in our FT. Our water flows from FT to GB and from GB to sump where it is pumped back to the FT hope this helps

[Verna Gross]

Here is a photo

[Georg Parlow]

Thank you, Verna.

I am not sure if I understand it exactly - do I get it right that your overflow pipe is a vertical inside the FT, and water flows into it from top? I am not sure about up and down on your pic. If so it doesn't help me a big deal, because I have a different thing - it is a vertical pipe with the water coming in from below, and overflowing out through a smaller side pipe. I am attaching a photo. This is to suck up and out of the FT as much of the muck as possible. 

If you have the thing I suspect, with water overflowin from top - how do you get the solids out?

[Verna Gross]

When the solids become a problem we will drain from the valve on the bottom of the tote. We have also noticed since we added fish that they are quite effective at keeping the bottom of the tank stirred up and more solids are coming out of the piping into the grow beds. Our overflow is a 4 inch diameter vertical pipe that actually penetrates through the tote 4 inches from the bottom of the tote. And feeds the GB's the GB's use a bell siphon to drain into the sump and we pump that back to the FT
We are also new to AP but it is quite evident our water turns over in the FT and our plants are growing like crazy

[BenHehle Beamz]

Build in as many valves as possible. for every overflow i added an valve, for that it was easy for me to adjust the whole system, so now water spilling in the sump. Pipe in FT, sucks feces from the bottom up and flows then to the GB (i built in a valve at that outlet, so i could regulate the water flow). Bell syphon cant be regulated, but it works very solid. I have my GB almost at the same level as the water surface of the FT, for that, in case my bell syphon fails to open up, it wont flood my GB (overflow will just stop automatic). If you have a pump which you can regulate, it makes things easier for you. Greetings usm Laendle ;)