Big And Small Goldfish

Big And Small Goldfish

Big And Small Goldfish Intro. for Stock Tank Aquaponics | Farming Seattle

This episode, I show all of my progress on the Stock Tank Aquaponics system. I had to do a few things in order to get ready for the goldfish.

1. Added 6 legs to each end of the grow bed. Since this bed is over 1000lbs I didn’t want it to crack the stock tank. I added 4×4 legs that were braced with 2×4’s and wood screws.

2. Going to install a bigger bell siphon intake valve, after some guidance it seemed a lot better to have a 1″ inner pipe on the bell siphon since the bed will be holding a lot more water. In my next video i’ll show that installation.

3. Added outdoor electrical plug, this allowed easy wiring for the pond pump, only 20ft away from the outlet.

4. Added Goldfish! Bought 20 small / 20 large feeder goldfish ~ $10. I set these guys in the water for ~10 minutes (should have been 30). Some seemed shocked, I think next time I will do the full 30 minutes, then slowly add the aquaponics water.

Products used in video:
1″ Banjo PVC Bulkhead:
2.25″ Hole Saw:
Pond Liner 13×10:
Pond Pump 1000GPH:
PVC 3/4″ Valves:

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Lava Rock Grow Bed Construction

 Continuing with my 300 Gallon Stock Tank Aquaponics system.

This video shows finishing up the grow bed which involves washing a lot of lava rock, installing a uni-seal, bell siphon & putting the pond liner in place.


Products used in video:
1″ Banjoo PVC Bulkhead
2 1/4″ Hole Saw
Pond Liner 13×10:
How to wash lavarock – Drill a bunch of holes in a bucket, load some lava rock & dunk that bucket and rock in a garbage can full of water. Do this 3-4 times while rocking the bucket while the water drains. At the end, rinse with a hose to clear out as much lava sand as possible.
Drill a hole with the holesaw, clean it up with the rasp & razor blade. Put the rubber pond liner down over the hole & cut a clean hole with the razor blade.
Next, you will want to arrange the pond liner so that it is pushed against the bed, then load in washed lava rock to the top. You might want to test your bell siphon before fully loaded.
Bell siphon – I’m using a 1″ PVC pipe about 10″ tall, with a 2″ PVC and cap about ~12″ tall with holes drilled at the very bottom. I will probably need to do some adjustment because it wasn’t siphoning very well.

Stock Tank Aquaponics, Grow Bed Construction

Stock Tank Aquaponics grow bed.

This bed is 6’x3′ by ~ 10″ tall. It is constructed with 3- 4×4’s 1 sheet of plywood & 8 – 2×4’s. I go through the process of building the base, walls & show each step along the way.

At the end I finished with putting a drain hole in one end of the bed which will have the bell siphon.

This build took about 2 hours, getting interrupted of course, next step is to put in the pond liner, cut out the spot for the drain & attach all of the fittings.

Tools Used:
Dewalt Circular Saw:
Dewalt Impact Driver:
1 1/2″ spade bit:

Materials list Used for grow bed (Home Depot):
15/32″ PLYWOOD – $20.65
8 – 2X4-92 5/8″ STUD – $23.12
2″ X 10′ PVC40 $8
3/4″ PVC 90 elbows:
3/4″ PVC valves x 2 –
2 1/2″ exterior screws:
2 – 3/4″ male to slip PVC:
3/4″ PVC Bulkhead:
2″ PVC Cap:
3/4″ PVC 45 elbows:
3/4″ PVC T fitting:
Pond Liner: