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You are much better off going with something like this from Gromau5 The company who is sponsored in the video is from Australia. There are companies all over now who sell these kits, but they are crazy expensive. You can source the parts yourself and make one for about 60% of the price of...

Personally I would be weary of this... Square COBs that look like these tend to be cheap Chinese COBS and usually half the LEDs in these COBS are either not working, or malfunctioning. But you won't see this when the COBs are running and without prior experience you will think the lights are...

@xtsho, AgSil-16H is really alkaline (I have never tested the stock solution), but 1 tsp to a gallon of the stock solution can take source water that has a pH of 5.9-6.0 and tip up to well over 7.0. So when I make up a new batch or top off batch of fertilizer I will add the silica first, then I...

If you call your water company, they should be able to either direct you to a website, send you a PDF in an email or send you a physical water report. They are usually pretty good about that sort of thing. Make sure to check to see what form of disinfectants that they are using, don't assume...

@xtsho, Portland is almost there... You want about 100ppm for use on plants, 4-4.5ppm's of silica won't do much.

@JohnDee, No problem. I wouldn't be such an advocate for the stuff if I didn't see positive results from using it. But it has to be used correctly or it can cause problems.

@xtsho, Silicate is for both soil and hydro. No, I don’t grow in coco. Everyone seems to think I do… I use modular Dutch buckets with hydroton as the media. If the silica isn’t added at the right time during mixing, it can cause nutrients to fall out of solution. So I just add it to the...

@JohnDee, I don't grow in soil or soil-less media like coco. I use self contained dutch buckets with hydroton as the media, so I am not really sure how silica will act in coco. As far as how much silica to provide for your plants, that's a good question... I would suggest 2 times a week with...

@xtsho, Normally I would totally agree with what you have to say, but I have seen so many positive results using silica. Especially during summer time. I can now grow pretty much anything I want all though the year and the silica helps the plants deal with the heat stress or low humidity or...

@Lordhooha, I don't mean to harp on the topic, but unless you are adding some form of silicic acid, or you have had your soil tested and know it is contains "enough", don't assume that any "good" soil has the appropriate amounts of water soluble silica, without knowing the actual content. I am...

Hello all, I just recently found out about this stuff called Grow-Sil, which is made from rice hulls and boasts a soluble silica amount of 99.9% and a pH of 7.0 Has anyone used this before? Is it like AgSil-16H? It appears I can swap the two out and use about half as much of the Grow-Sil as I...

@Lordhooha, No, I grow in hydro. You shouldn't assume the soil you are using has enough silica. There may be sand in the soil, but this isn't bio-available silica. It works wonders for plant stress and nutrient absorption, especially in the summer. There are a lot of uses for soluble silica...

I completely agree, I prefer to use EC, but ppm is commonly used and when asked no one seems to know what you mean by "conversion factor" so they are using a system that "appears" easier but actually can cause a lot of issues for others trying to replicate. I use the NaCl conversion factor...

Hello all, I just recently found out about this stuff called Grow-Sil, which is made from rice hulls and boasts a soluble silica amount of 99.9% and a pH of 7.0 Has anyone used this before? Is it like AgSil-16H? It appears I can swap the two out and use about half as much of the Grow-Sil as I...

Hello all, I know I am late to this party but...anyway... I just saw a video where a guy called it Hy-drot-in and I thought I would start a thread but I did a search and found this one. For years I have been calling it Hydro-ton or Hydro-tin or something that sounds like hydro-tawn, but not...

@Kipn, Use a muffler on the exhaust end of your extraction fan, it will cut the sound drastically! I built a cheap one from 1/4" hardware cloth, a 2 foot square piece of 1.5" egg-crate foam and some zip ties and it cost me less than $20. It's not the prettiest girl at the dance but she works...

@eclipse01, I just noticed your last post, the plants look like they need some nitrogen. If the bottom leaves begin to turn brown, this is the plant robbing nitrogen from lower leaves to feed newer leaves. Either that or your soil is too dense and what you are seeing is the beginning of root...

If you are having trouble getting good soil, then ditch the soil and move to media. A good self contained Dutch bucket system won't cost you much and it will solve your soil issues. You can use either perlite or hydroton as the media. Here's a link to a guy who used to post some decent videos on...

@xtsho, Thanks for the info. I was not aware that diatomite media was kiln fired like hydroton… This sort of makes it similar to terra cotta, except the diatomaceous earth also makes it an insect repellant… The link you provided is a company that offers a wide range of products (wholesale), I...

@xtsho, I am not aware that is is kiln fired. I this this is just diatomite rock that is crushed up into 10-15mm size pieces and then packaged and sold as a media. I am talking about using it as a hydro media, either in place of or as a capper for hydroton. All the cat liters I have seen are...