{"product_id":"lifeguard-5-ft-x-90-ft-45-mil-epdm-pond-liner-durable-fish-safe","title":"Lifeguard 5 ft x 90 ft 45-Mil EPDM Pond Liner - Durable Fish-Safe","description":"\u003cp\u003eOur review of the Lifeguard 45-mil EPDM pond liner finds it best suited to DIY pond builders and hobby aquaculturists who need a flexible, long-lasting containment membrane. The single biggest reason to consider this liner is its 45-mil EPDM construction, which stays flexible without plasticizers and is certified safe for koi and other aquatic life, making it a practical choice for outdoor ponds, waterfalls, and aquaponics setups where durability and wildlife safety matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e45-mil EPDM rubber:\u003c\/strong\u003e Provides a thicker, more durable waterproof barrier that resists UV and puncture damage better than typical vinyl alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFish and wildlife safe:\u003c\/strong\u003e Certified safe for koi, turtles, and aquatic life, so it can be used confidently in ponds and fish hatcheries without chemical worries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo plasticizers:\u003c\/strong\u003e Remains flexible year-round and will not crack or become brittle in cold conditions, which is important for seasonal climates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to shape and install:\u003c\/strong\u003e Lays flat and conforms to curves, shelves, and streambeds, simplifying DIY installations and custom shapes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile outdoor use:\u003c\/strong\u003e Suitable for ponds, waterfalls, streambeds, retention basins, and aquaponics systems, reducing the need for multiple liner types.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis liner is aimed at homeowners building small to medium outdoor water features, hobbyist koi keepers, and aquaponics growers who need a reliable, fish-safe membrane that handles temperature swings without becoming brittle. The 5 ft x 90 ft roll size is convenient for long linear runs or folded coverage in varied shapes.\u003c\/p\u003e\n\u003cp\u003eIt may not be the ideal choice for those needing custom-cut factory panels in unusual shapes or for projects requiring heavier industrial-grade liners beyond 45 mil. Installers expecting welded seams or factory-formed ponds should look at commercial service options rather than a DIY roll.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDurable 45-mil thickness gives good puncture and abrasion resistance compared with thin vinyl.\u003c\/li\u003e\n\u003cli\u003eCertified safe for fish and wildlife, so it is appropriate for koi ponds and aquaponics.\u003c\/li\u003e\n\u003cli\u003eStays flexible year-round with no plasticizers, reducing the risk of cracking in cold weather.\u003c\/li\u003e\n\u003cli\u003eEasy to cut and conform to complex pond shapes for DIY projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users report mixed experiences with puncture resistance depending on site conditions, so heavy foot traffic or sharp substrates require careful underlayment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e45-mil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e5 ft x 90 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary uses\u003c\/td\u003e\n\u003ctd\u003ePonds, waterfalls, streambeds, aquaponics, retention basins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWildlife safety\u003c\/td\u003e\n\u003ctd\u003eCertified safe for koi and aquatic life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e25-year manufacturer warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Lifeguard 45-mil EPDM liner is a solid value for DIY pond builders and aquaponics hobbyists who want a fish-safe, flexible membrane that resists UV and cold-induced cracking. Its 45-mil thickness and certification make it a sensible middle ground between thin vinyl and heavier industrial liners, provided installers use suitable underlayment to protect against sharp objects.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this liner safe for koi and other fish?\u003c\/strong\u003e\u003cbr\u003eYes, it is certified fish and wildlife safe and marketed specifically for koi ponds, turtles, and aquaponics systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the EPDM become brittle in cold weather?\u003c\/strong\u003e\u003cbr\u003eNo, EPDM without plasticizers remains flexible year-round and will not crack or split like some vinyl liners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need underlayment under the liner?\u003c\/strong\u003e\u003cbr\u003eIt is recommended to use underlayment or protective padding to reduce the risk of punctures from sharp stones or roots, especially in rough substrates.\u003c\/p\u003e","brand":"Anjon Manufacturing","offers":[{"title":"Default Title","offer_id":48252207300827,"sku":"B01L7FP4TS","price":534.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61jYF_ZlsiL._AC_SL1500_8a56df3a-c1e2-4d51-8f6b-430d4a42234b.jpg?v=1776598308","url":"https:\/\/gearmusthave.com\/products\/lifeguard-5-ft-x-90-ft-45-mil-epdm-pond-liner-durable-fish-safe","provider":"GearMustHave","version":"1.0","type":"link"}