{"product_id":"halimeda-cactus-macroalgae","title":"Halimeda Cactus Macroalgae","description":"\u003ch2 style=\"margin: 0 0 12px 0; font-weight: 800; font-size: 28px; letter-spacing: -0.3px; color: #123844;\"\u003eHalimeda Cactus Macroalgae\u003c\/h2\u003e\n\n\u003cp style=\"margin: 0 0 12px 0; color: #22323a; line-height: 1.7;\"\u003eHalimeda (\u003cspan style=\"font-style: italic;\"\u003eHalimeda sp.\u003c\/span\u003e) is a distinctive calcareous green macroalgae recognized for its \u003cstrong\u003estacked, coin-shaped segments and upright cactus-like growth form\u003c\/strong\u003e. Growing from a rooted base in sand or rubble, it develops branching clusters that create a natural reef-like appearance in aquascapes.\u003c\/p\u003e\n\n\u003cp style=\"margin: 0 0 18px 0; color: #22323a; line-height: 1.7;\"\u003eUnlike many fast-growing macroalgae, Halimeda forms \u003cstrong\u003ecalcified segments composed partly of calcium carbonate\u003c\/strong\u003e, giving it a rigid structure and making it biologically unique. Its firm, structured growth provides contrast against softer macroalgae while contributing to a natural reef aesthetic.\u003c\/p\u003e\n\n\u003chr style=\"border: 0; border-top: 1px solid #dde5e8; margin: 18px 0;\"\u003e\n\n\u003ch3 style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 18px; color: #1a5a61;\"\u003eAvailable Options\u003c\/h3\u003e\n\n\u003cdiv style=\"background: linear-gradient(180deg,#f6fbf8 0%, #edf7f2 100%); border: 1px solid #d4e6e3; border-radius: 12px; padding: 13px 15px; margin-bottom: 10px;\"\u003e\n\u003cp style=\"margin: 0 0 6px 0; color: #1a5a61;\"\u003e\u003cstrong\u003eFull Starter Plant\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 18px; color: #22323a; line-height: 1.7;\"\u003e\n\u003cli\u003eSingle root base\u003c\/li\u003e\n\u003cli\u003e1–3 stalks branching from the same base\u003c\/li\u003e\n\u003cli\u003eIdeal for establishing Halimeda in new areas of the aquarium\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: linear-gradient(180deg,#f6fbf8 0%, #edf7f2 100%); border: 1px solid #d4e6e3; border-radius: 12px; padding: 13px 15px;\"\u003e\n\u003cp style=\"margin: 0 0 6px 0; color: #1a5a61;\"\u003e\u003cstrong\u003eMature Colony\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 18px; color: #22323a; line-height: 1.7;\"\u003e\n\u003cli\u003eEstablished branching colony\u003c\/li\u003e\n\u003cli\u003eMultiple stalks forming a full display cluster\u003c\/li\u003e\n\u003cli\u003eSuitable for immediate aquascaping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003chr style=\"border: 0; border-top: 1px solid #dde5e8; margin: 18px 0;\"\u003e\n\n\u003ch3 style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 18px; color: #184f69;\"\u003eCare Information\u003c\/h3\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: separate; border-spacing: 10px 10px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%; background-color: #eceff1; border: 1px solid #cfd6da; border-radius: 10px; padding: 11px 13px; color: #22323a; vertical-align: top;\"\u003e💡 \u003cstrong style=\"color: #435760;\"\u003eLighting\u003c\/strong\u003e\u003cbr\u003eModerate to High\u003c\/td\u003e\n\u003ctd style=\"width: 50%; background-color: #eceff1; border: 1px solid #cfd6da; border-radius: 10px; padding: 11px 13px; color: #22323a; vertical-align: top;\"\u003e🌊 \u003cstrong style=\"color: #435760;\"\u003eWater Flow\u003c\/strong\u003e\u003cbr\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #eceff1; border: 1px solid #cfd6da; border-radius: 10px; padding: 11px 13px; color: #22323a; vertical-align: top;\"\u003e📍 \u003cstrong style=\"color: #435760;\"\u003ePlacement\u003c\/strong\u003e\u003cbr\u003eSandbed or rubble zones\u003c\/td\u003e\n\u003ctd style=\"background-color: #eceff1; border: 1px solid #cfd6da; border-radius: 10px; padding: 11px 13px; color: #22323a; vertical-align: top;\"\u003e⚙️ \u003cstrong style=\"color: #435760;\"\u003eCare Level\u003c\/strong\u003e\u003cbr\u003eEasy to Moderate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #eceff1; border: 1px solid #cfd6da; border-radius: 10px; padding: 11px 13px; color: #22323a; vertical-align: top;\"\u003e📈 \u003cstrong style=\"color: #435760;\"\u003eGrowth Rate\u003c\/strong\u003e\u003cbr\u003eModerate\u003c\/td\u003e\n\u003ctd style=\"background-color: #eceff1; border: 1px solid #cfd6da; border-radius: 10px; padding: 11px 13px; color: #22323a; vertical-align: top;\"\u003e🧪 \u003cstrong style=\"color: #435760;\"\u003eNutrient Uptake\u003c\/strong\u003e\u003cbr\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr style=\"border: 0; border-top: 1px solid #dde5e8; margin: 18px 0;\"\u003e\n\n\u003ch3 style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 18px; color: #6a6b58;\"\u003eSpecial Considerations\u003c\/h3\u003e\n\n\u003cdiv style=\"background-color: #faf8ee; border: 1px solid #e6e1c9; border-left: 4px solid #b7ad78; border-radius: 10px; padding: 13px 15px; color: #22323a;\"\u003e\nHalimeda produces calcified segments that incorporate calcium carbonate into its structure. As a result, it consumes both calcium and alkalinity during growth. Maintaining stable calcium and alkalinity levels is important for continued healthy growth and branching.\n\u003c\/div\u003e\n\n\u003chr style=\"border: 0; border-top: 1px solid #dde5e8; margin: 18px 0;\"\u003e\n\n\u003ch3 style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 18px; color: #123844;\"\u003e🌱 Propagation\u003c\/h3\u003e\n\n\u003cp style=\"margin: 0 0 8px 0; color: #22323a; line-height: 1.7;\"\u003eHalimeda spreads through fragmentation and basal growth:\u003c\/p\u003e\n\n\u003cul style=\"margin-top: 0; padding-left: 18px; color: #22323a; line-height: 1.7;\"\u003e\n\u003cli\u003eBroken segments may establish in nearby substrate\u003c\/li\u003e\n\u003cli\u003eMature plants can produce new stalks from the base\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eColonies expand naturally as they grow\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"border: 0; border-top: 1px solid #dde5e8; margin: 18px 0;\"\u003e\n\n\u003ch3 style=\"margin: 0 0 10px 0; font-weight: bold; font-size: 18px; color: #123844;\"\u003eLearn More\u003c\/h3\u003e\n\n\u003cp style=\"margin: 0; color: #22323a; line-height: 1.7;\"\u003e\nFor detailed species information, compatibility, and care tips, visit our \n\u003cstrong\u003e\u003ca style=\"color: #1d5c78;\" href=\"https:\/\/www.macroalgaefarms.com\/pages\/species-library\"\u003eSpecies Library\u003c\/a\u003e\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003chr style=\"border: 0; border-top: 1px solid #dde5e8; margin: 24px 0;\"\u003e\n\n\u003cdiv style=\"background-color: #f6f8f9; border: 1px solid #dde4e7; border-left: 4px solid #8a98a0; border-radius: 10px; padding: 13px 15px; font-size: 13px; color: #607078; line-height: 1.65;\"\u003e\n\u003cstrong style=\"color: #46545b;\"\u003eLivestock Disclaimer\u003c\/strong\u003e\n\n\u003cp style=\"margin: 8px 0 10px 0;\"\u003e\nDue to natural variation between specimens and species within a genus, the item you receive may not appear exactly like the one pictured. Photographs are representative examples of the species or growth form.\n\u003c\/p\u003e\n\n\u003cp style=\"margin: 0 0 10px 0;\"\u003e\nIndividual specimens may vary in size, shape, coloration, and growth pattern depending on age, lighting conditions, and environmental factors.\n\u003c\/p\u003e\n\n\u003cp style=\"margin: 0;\"\u003e\nApproximate size ranges are provided for reference but may differ slightly from the specimen received.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Macroalgae Farms","offers":[{"title":"Full Starter Plant","offer_id":47817551577347,"sku":"(WC)","price":14.99,"currency_code":"USD","in_stock":true},{"title":"Mature Colony","offer_id":47817551610115,"sku":"(WB)","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/7151\/7699\/files\/Halimeda-Poster.png?v=1772653484","url":"https:\/\/www.macroalgaefarms.com\/products\/halimeda-cactus-macroalgae","provider":"Macroalgae Farms","version":"1.0","type":"link"}