RAW- Silica for Strong Cell Walls and strengthening Stems Plant Feeding Supplement for Indoor Outdoor Use Hydroponics- 2 oz

I've used this exact brand and item multiple times, have always noticed a difference and believe it to be of very high quality. Affordable and the difference is in the harvest!

Nice product very easy to use and the npk team have amazing knowledge to tap into on their website and live chat, as well as Harley's videos too, however I have since found larger packs for much cheaper at a local hydro store

First off I want to say the items came early and were all in perfect condition. Silica is a must, it helps the plants uptake of food. It strengthens the stems and really helps in the plants protection against aphids and sap sucking insects.

Too early to tell if it’s working, but fingers crossed it does. However, use this product with caution. Although non toxic the silica dust should not be inhaled at all. I have since looked into this product more and found it is Diatomaceous Earth which can be bought generally on its own. There are 2 types of Diatomaceous earth, Food grade and Filter grade, the food grade is supposed to be more safe, with the filter grade much more harmful. Unfortunately there is no way of knowing which of these grades is used in this product. I accidentally breathed in some of the dust, which were minute amounts and felt the effects soon after. I have since learned that the silica dust (depending on the grade / rate / level of exposure) can irritate nose / lungs from acute to chronic / serous issues. I understand that these effects are most likely long term and within industrial environments, however, I can only advise according to the effects I myself felt when inhaled. I will be using a mask / respirator from now on for sure. Use at your own risk

Product precipitated out upon contact with pure water. Waste of time and money.