Model # BG42QTH

Internet # 203600457

42 qt. Soil Enhancer

$38.97 /each



Model # BG42QTH

Internet # 203600457

Hydrorock 42 qt. soil enhancer is made from pure organic clay pebbles that help intensify hydroponic growth. Hydrorock will help promote healthy plant growth without the use of soil. The advantage of the organic clay pebble is the light weight structure, durability, and permeability. With this feature it will reduce water usage and keeps hydrated for longer.

  • Use in hydroponic system and can be blend with soil to become a soil enhancer
  • Helps retain up to 35% of its weight in water and have a neutral pH
  • Hydrorock clay pebbles are long-lasting and can be reused after washing
  • Clay pebble design ensures excellent aeration
  • Use this calculator to determine how much product you need to complete your project:

    Home Depot mulch and top soil calculator tool


Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Bag Capacity/Dry Volume (cu. ft.) 
1.404 cu ft 
Soil Amendment Type 
Warranty / Certifications
Manufacturer Warranty 
Do not have Manufacturer Warranty. 


Soil Amendment Type: Other
Brand: Hydrorock
Review Rating: 4 & Up
Price: $30 - $40
Organic: No
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 166ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;


Rated 4.5 out of 5 by 6 reviewers.
Rated 4.0 out of 5.0 by It is what you'd expect. Used this Hyrdorock on a jar garden project and in an aquaponics project. For my projects 42qts was more than plenty which is just shy of 1.5 cubic feet (a cubic foot being a 1' x 1' x 1' pile). The rocks are varying sizes and have a lot of surface area. I put some in the bottom of some jars (with pebbles on top to help fill-in then soil) to help prevent root rot by allowing any excess water to settle to the bottom and then evaporate out later. [Note that you'd want to cover the bottom of the jars as the roots grow because roots don't like sunlight.] For my aquaponics grow bed the Hydrorock also worked well with more established plants. February 11, 2014
Rated 4.0 out of 5.0 by Testing this product for a while I decided to try this hydrorock cooked clay system in a floater and growing tank but before go build the larger system a hybrid aquaponcis system of my own making and invention make sure this Hydrorock was the right medium Tested a Kale plant seen in the photo was transplanted when it was 2 inches tall it nearly doubled in size in the 5 weeks promising results December 9, 2013
Rated 5.0 out of 5.0 by Water evaporating rocks Despite the heavy weight of the bag, these rocks are lightweight. They can be added to the bottom of the pot below the soil to help retain the water so the roots stay moist. You can also add them on top as a type of mulch so it keeps the moisture in. They can also be used in planting beds as well. They are not biodegradable so they will last. March 12, 2014
Rated 5.0 out of 5.0 by Great and Functional Product My dad installed a row of Hydrocks at the open edge of our front landscaping that wasn't lined with hardscaping. We experience storm water run-off in some parts which can displace the mulch of the landscaping. After experiencing at least four rainstorms since installation, one of which was steady and lasted for part of an afternoon through the night, most of the Hydrocks stayed in place with only a few spilling out into the driveway. November 5, 2013
Rated 4.0 out of 5.0 by Animal, Mineral, or Vegetable? Ok, so I have to admit that this was not what I had expected from the description when I ordered it. So to help others, let me give you my candid take on this product. It's a bag of rocks, small, non-uniform rocks, like a cross between lava rock and coral from a reef. Most are about an inch or so in diameter, but not uniform like gravel, or as hard. I can snap a piece in half with my hands, but it should not break on its own. It is porous and holds water, but dries out quickly if not kept damp in dry climate. If you are looking for a filler material that can be cleaned and reused for a hydroponic soil mix, this may work out. I think the root structure will determine if this soil filler is a good substrate so you need to try it in your own environment and see if it is a good fit for your application. I have used clay based fillers before with mixed results, this may work out better, but only time will tell. As for re-use, I'm not sure how to actually clean rocks, maybe just a boiling water rinse will do. If they were uniform, I might brush them off, but these are too irregular. February 6, 2014
Rated 5.0 out of 5.0 by Keeps seedlings growing in AZ The Hydrorock is fantastic when added to potting soil. I have no decent ground for growing here so I depend on raised mini-beds and pots. Lake Havasu, AZ is hot, very hot and dry. When we get humidity above 15% we suffer. Consequently our veggie plants suffer from low humidity. I have found it very difficult to keep plants growing, especially seedlings and , yes Sept. is the time to plant here. Veggies cook on the vine in summer if they survive and we do not freeze, well, hardly ever. I mixed about 25% Hydrorock with old potting soil and it helps keep it moist and soft. I also grow intense, that is close. I have 9 squash plants in a 20" pot and they are doing fantastic. They look healthy, full & green. My green beans all came up but sadly a rabbit got in and ate them down to nothing. They have been replanted and are growing again. Fence, gotta use a fence. The Hydrorock keeps the soil moist even on windy days and that is a must here. Will submit another review in a few months with final results but for now I am thrilled. October 16, 2013
  • 2016-05-23 T16:46:50.611-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_6, tr_6
  • loc_en_US, sid_203600457, prod, sort_default
1-6 of 6
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 176ms