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my new hydroponic setup
January 21, 2014 - 12:10 am
Member Since: January 5, 2014
Forum Posts: 26
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[Image Can Not Be Found] a DWC in bucket with styrofoam lid holding the netpots.(thanks to GG for netpots).i  also prepared my own nutrient stock solutions(thanks to geekgardener and gardenweb forums)got pH strips for testing pH.going to use cocopeat in half and gravel in the rest as grow medium.i plan to plant 6 plants in NFT and 4-5 in DWC.planning to start with tomato.seeds are germinating may take 2 weeks before i questions are how much nutrient solution in volume be kept in reservoir  for NFT and DWC  for above number of  frequently i have to water in NFT daily.when to change nutrient solution in reservoir in NFT and it enough if i go by pH alone.or have i to check EC and TDS also.are there kits for measuring these.i am adding an image of my setup too.sorry if i have asked too many queries  

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Bangalore, India
January 28, 2014 - 10:02 pm
Member Since: May 1, 2010
Forum Posts: 690
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The volume of nutrient in NFT depends on the kind of plant you are putting. While a thin film is enough, it wont be resilient to power outages. Also smaller reservoirs can have fluctuating pH and EC since the plants take nutrients. Larger reservoir can buffer the changes that happen.

When to change the solution, you need to check the volume of nutes in the reservoir, their ec and pH. both will change, you can continue to add water/nutrient concentrate to reach the desired EC. or Simply replace the solution every 10 days.

Please repost the images since they are not displayed in the original post.

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February 11, 2014 - 8:24 pm
Member Since: January 5, 2014
Forum Posts: 26
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sir i am posting the photos of my hydroponic raft system.since i was not able to germinate the tomato and okra seeds.i simply transplanted the corn seedlings into the raft system to see how it works.may be two to three weeks later i can put the tomato and okra into this.i have added 10 liters of nutrient solution prepared by me(thanks to hydrobuddy).i have added 2 wicks to each netpot so that they r self watering.i am working on this i am not getting my NFT setup complete.


how often i should change the nutrient solution in this setup?

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New Member
July 1, 2014 - 11:52 pm
Member Since: June 26, 2014
Forum Posts: 2
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Here, the best way is to maintain records of the total nutrient uptake by the plants. This helps you figure out whether your nutrient solution is helping the crop accelerate growth or not.

The steps and tricks you can use include:
1. Record water meter readings after each sampling
2. Quantity of different stock solutions used during samplings
3. Volume of alkali or acid used between all the samplings
Basically, the idea is to keep complete records of pH levels, temperature, conductivity and water meter readings on regular basis.

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