Rated 4.1 out of 5 by 59
Rated 1.0 out of 5.0 by Jeremy Not for Hydroponics!
If you're looking for a grow media for a flood and drain hydroponics/aquaponics system keep looking. 99.9% of these chinese pellets float. I bought three 50L bags and there were only about a dozen pellets that sank. I tried power washing them, soaking them for a week, vinegar/peroxide baths you name it. Make sure you keep your receipts as you'll be returning because of frustration.
June 7, 2016
Rated 5.0 out of 5.0 by OrchidGrower Expanded Clay
Hard to find a good quantity of this product at such a reasonable cost; and with free shipping to the store, it's easy to get.
October 11, 2016
Rated 2.0 out of 5.0 by doodad Floating Hydroponic Stones
I read a reviewer who said this product floated. I assumed the writer meant a few stones floated. NOPE. The whole freakin 50L bag floats in a 50 gallon trash can. That is a definitely problem! These stones are NOT SUITABLE for flood and drain! Fortunately for me I was planning on using fabric pots in my aquaponic flood and drain bed to cut down on maintenance. If the stones float in the pots I can use pebbles on top to hold them down. Other than the surprise of seeing 50 liters of stones float, these stones seem extremely hard, and non porous (meaning they do not get water logged and sink - I've soaked them.) So they should to the job. TiP: Before using clean these stones. Put about 30 small holes in the bottom of the bag with a screwdriver or such. Than cut a slit in the top. Use a hose to run water through the slit at top. There is always lots of dust with hydro rocks. So running water through the bag rinses most of the dust out the bottom. Than dump the rocks in a big container for a more thorough washing. Recommended with qualifications.
September 10, 2016
Rated 5.0 out of 5.0 by Rudger Value Purchase
Shipped quickly and product is as advertised. Looking forward to finishing my agriponics project.
July 4, 2016
Rated 3.0 out of 5.0 by bh62 hydroponic rock
I gave these volcanic stones a 3, well because they're rocks. Anyway they seem to do well and are relatively the same size. Be careful though as these rocks do float.
July 5, 2016
Rated 5.0 out of 5.0 by Aboors Works perfect
If you're starting a hydroponic garden you must buy this stone. It works perfect for growing plants fast. Only downside is you have to wash it off several times bc it's dirty and will pollute your water and mess up the pH
May 31, 2016
Rated 5.0 out of 5.0 by PatioPepperBoy great product for gardening
Grow rock provides the best drainage for growing chili peppers. My 4x7ft container pepper garden already has over a bushel of growing peppers. Home Depot has the best gardening supplies in town.
June 30, 2015
Rated 4.0 out of 5.0 by RockRiver As Expected
This stuff was what it should be & for a reasonable price. I used 200 Lbs which filled one Aquaponics bed. I have two others to do and will use this again. Compared to other product prices this was the best I could find for the amount ordered & it was delivered quickly by UPS & no shipping charge.
It does need to be rinsed before using but that was easy after developing a decent method.
May 27, 2014