{"product_id":"extra-large-sponge-rock-8","title":"Extra Large Sponge Rock (#8)","description":"\u003cp\u003e\u003cstrong\u003e3 litre box of horticultural Sponge Rock\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe same composition as perlite but in larger chunks - end even larger than the #4 grade.   Sponge Rock is a naturally occurring, mixed glassy silicate of volcanic origin which 'pops' when furnaced. Its unique internal structure consists of numerous tiny closed air cells surrounded by a large exterior irregular surface. Sponge Rock is ultra-lightweight, inert, sterile, permanent, incombustible, asbestos- free, non-toxic, rot and vermin proof and has a neutral pH. Its extremely large, open surface area allows it to retain water in mixes while maintaining air spaces, important for healthy root growth.\u003c\/p\u003e","brand":"Ravenvision Orchid Supplies","offers":[{"title":"Default Title","offer_id":48198551142565,"sku":"fsz1788063192156","price":4.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0711\/1878\/2629\/files\/extra-large-sponge-rock-8_1.jpg?v=1788063200","url":"https:\/\/www.evergreenporch.shop\/products\/extra-large-sponge-rock-8","provider":"My Store","version":"1.0","type":"link"}