Ravnis

Ravnis Indoor IAVS

13 posts in this topic

Oh, it's nothing fancy,   just a chain and an eye hook.  The hanging kit came with the light.

 

 

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bigdaddy likes this

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Hi Rav, can you post some pics of your fish tank? What do you have in terms of fish/tank size? Looks like great plant growth!

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My tank is buried right now.  It's just a standard 75 gallon aquarium.  I do have two hang on the back(HOB) filters going.  I've got to restock my test chemicals before I cut them loose, so I can monitor parameters.  I've got 7-8 tilapia in the  tank around 3/4 to 1 lb in size.

Noticed my spinach going to seed, so had to hurry and harvest everything.  I'm still in the learning phase of the LED light and botched  this growth cycle with lots of burned leaves.  Had  a little over 1/2 lb of greens after harvesting and separating the stalks from the leaves in  a 30" x 20" growing area.   Nothing to brag about, but gives a bench mark to improve upon.   I did find out some things.  My aquarium had  been running for about a year as just an aquarium, no growing component.  The nitrate levels were 160 ppm plus.  I kept having problems with the pH jumping up due to the plants raising the pH as they sucked up the nitrate. Once the nitrate dropped  to the 10 to 20 ppm range the pH stabilized.  I kept getting worried as it was heading toward 7.6, but it's back down to 7.0 to 7.2.  I can live with that for a bit. 

 

plant growth (1024x576).jpg

bigdaddy likes this

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Yes.  Greens are good at dropping nitrates, but the leaves curl a lot with high nitrate.

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Wow, has it really been a year since I posted this thread, Time flies when your getting old.

 

I moved the system in front of the window a couple of months ago when I had some help. I don't move like I used to, so need help moving bigger things.  It ran without the growlight during that time and it got really sad looking.  These pics are after hanging the grow light about a week ago.  I have new flowers on the pepper plant and a few tomatoes going now.  

The overflow drain has yet to be used, but still like having it in an indoor setup. It's a pain to get water out of carpet.

 

 

sand.jpg

system (1).jpg

vkn and ande like this

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Working just fine. I've had a problem with my furrows not staying formed, but I think I have too much force of water from my pump and need to redo the output so it doesn't erode it.   It states astm c33 in its listing and plants grow well in it.  It's easy to get and works.

 

  I did not do a bucket test. I had lost too much sand from replanting the short term crops and needed something fast.  After reading  Mark's post on ASTM C33 spec that confirmed what I had suspected , I just went with it.  I really think some of us have gotten way too hung up on "the right sand" as long as it's inert and "sharp" sand.   I've used the original less than perfect sand (read more fine than specified) and was satisfied with growth and Just had to adjust pump time due to slower drainage.

I have to say again.  I really like your new forum Gary.  Though I haven't had as much time to read through it as I would like. 

mhaigh, bigdaddy and GaryD like this

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Update on the all purpose sand.   There is big variance between sand bags and the last ones I bought had a lot of shells in them and compacted.  I had moved the system outside for the summer.   Drainage became slower till the point it would take an hour to drain and with Daytime temps over 100F  it started killing the plants and killed the nitrifying bacteria.   This answered by personal question for myself, can flow rate be adjusted to compensate for sand that drained less that ideal.  The answer in this particular scenario of high temperatures is a resounding NO.     I have since replaced it with pool filter sand from the same company and nitrification has restarted and the plants are rebounding and putting of fruit.

So to recap,  

quickcrete all purpose sand --- too much variation from bag to bag and some bags had high amounts of fines in them.

quickcrete  pool filter sand --  bought 10 bags so far- appears to be finely ground and sharp quartz crystals- good drainage, no alteration of ph, no visible signs of shells.

The roots expand better in the pool sand than the all purpose sand , so growth is definitely better in the looser sand.  

vkn, bigdaddy and ande like this

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Posted (edited)

I experienced almost similar results in some of the old trials.. roots, growth and yield were much better but then most of the systems with looser sand clogged after say 18 months or so.

Edited by vkn (see edit history)

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On 11/07/2018 at 5:33 PM, Ravnis said:

Update on the all purpose sand.   There is big variance between sand bags and the last ones I bought had a lot of shells in them and compacted.  I had moved the system outside for the summer.   Drainage became slower till the point it would take an hour to drain and with Daytime temps over 100F  it started killing the plants and killed the nitrifying bacteria.   This answered by personal question for myself, can flow rate be adjusted to compensate for sand that drained less that ideal.  The answer in this particular scenario of high temperatures is a resounding NO.     I have since replaced it with pool filter sand from the same company and nitrification has restarted and the plants are rebounding and putting of fruit.

So to recap,  

quickcrete all purpose sand --- too much variation from bag to bag and some bags had high amounts of fines in them.

quickcrete  pool filter sand --  bought 10 bags so far- appears to be finely ground and sharp quartz crystals- good drainage, no alteration of ph, no visible signs of shells.

The roots expand better in the pool sand than the all purpose sand , so growth is definitely better in the looser sand.  

Hi Ravnis...can you tell me the price and size of the quikcrete pool filter sand, please?  Does your source have quantity discounts on the filter sand?  Does the bag contain any technical information that might be useful?

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