Backyard Aquaponics
A place to discuss aquaponics

I am a salesman before,My major course in university is computer.I use deep well water,I have tested the original water,it is good have no any heavy metal elements.

I check out Ryan's thread usually.He is my idol in ap.I found a market which include 35-45 year old women which have 2-12 year old kid.I sold to them directly by mobile internet.I found a big fish food company in my city.

I have some questions want to discuss with you all.

first: I add chelate iron to my system when the leaves show symbol.but my troughs water look like coffee colour,The fish pool water look more dark brown.When my clients come to visit they don't like the colour.What's the colour of your ap system?




second: My troughs of ap have many duckweed.It is difficult to get rid of.I just turn a blind eye to it or must do something?



third: My troughs have many snails always found them hide under foam board,what should I do,or just close my eyes,hehe?

Hi Stone,You are using at a guess FE EDDHA for your iron supplement,hence the colour in the water,you could change over to FE DTPA,this will dye the water a slight yellow colour but is nowhere near as bad as the colour in EDDHA.It will take a considerable amount of time to remove this colour from your water and you are right the colour does put people off.
To remove the snails you need to add fish into your troughs,Redear sunfish is one example that will quite happily munch there way through them.
I am amazed the duckweed is growing under the floats,or is it getting washed into the troughs from another source ? Scoop out as much as you can and let the fish eat it,Tilapia love the stuff.

Fantastic build. It must be nice to work in there. Are the fish tanks under shelves or in another building?
What is the water temperature? This looks so cool, I have a bunch more questions.

I used DTPA for months and still had iron issues. My PH was above 7 and I couldn't get it lower. Changed to EDDHA and FE problems were gone in a few weeks. Ph is down below 7 now and I use the DTPA most of the time. I still have some problems using just the DTPA, and then dose with the EDDHA and problem solved. I hate my red water, I can't see the fish. But, I hate weak looking plants worse.

Stone, what is your PH and KH?

Thing is Chris that might be right,i reckon EDDHA is the best product,BUT customers or people just looking at the system can not understand blood red water,to them there is something wrong,if i was Stone i would swap over to DTPA and up the dosing amount to compensate if i still had problems with iron.
I prefer EDDHA as a product but wont go back to it,i will dose with DTPA,foliar EDDHA.

That's a good compromise Andreas. Foliar spray. I may do that if I ever decide to add the hydro beds to my RAS building.
It sure makes a difference between my AP and my RAS. On the flip side, the fish are much more comfortable in the red water then the clear water. Reminds me of spear fishing in super clear water...very hard. Much easier to get close enough for a good kill shot when the visibility is under 10'.

fantastic!

pests are a bug problem in AP

I know you cant use youtube in china but look at https://www.brightagrotech.com/ipm-inte ... anagement/

he has great youtube channel but perhaps reading English is easier or try with a VPN

GOOD luck!

what part of China are you in?

Thanks a lot.

you teach me a lot about iron chelate.
I have put some tiny fishs into dwc troughs,a month later I found my plant's roots disappeared.haha.I found a electric device too shock the fish to fall in a faint,then use mesh to catch them.The fish exceed 10cm now.I dare not to put fish in.

My foam board have gap between trough's wall,and I have not jam the hole without plant.So sunlight can shine in the water.

The fish tanks are in the same greenhouse,but covered with black shading net.
water temp between 12-28 centigrade.

I do not know DTPA and EDDHA or EDTA can lead ph rise.My water's ph is 7-8.It never drop below 7.I do not know the reason.
I have not test KH once.What is the recommended value?

Great idea.
But I dilute EDDHA to make foliar nutrient, but It is still blood red water,It will dye the faom board.
Do you have any suggestion about EDTA?

Thanks a lot for your information.I use vpn to watch youtube.
I am in Sichuan province.