{"product_id":"bluelab-pump-cassette-small-medium","title":"Bluelab Pump Cassette Small\/Medium – For PeriPod M3 \u0026 M4","description":"\u003ch2\u003eRestore full dosing accuracy without replacing the pump\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBluelab Replacement Pump Cassette Small\/Medium\u003c\/strong\u003e is the wear part inside the peristaltic dosing pumps of the \u003cstrong\u003eBluelab PeriPod M3 and M4\u003c\/strong\u003e and the \u003cstrong\u003eBluelab pH Controller, pH Controller Connect and pH Controller Wi-Fi\u003c\/strong\u003e. One unit holds the \u003cstrong\u003erollers and the internal pump tubing\u003c\/strong\u003e, so a single swap renews everything that wears with use while the drive motor stays in place. It suits Bluelab's \u003cstrong\u003e10–120 ml\/min pumps only\u003c\/strong\u003e; the PeriPod L3 takes its own larger cassette.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-piece cassette\u003c\/strong\u003e – rollers and internal tubing renewed together\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits five Bluelab units\u003c\/strong\u003e – PeriPod M3, PeriPod M4, pH Controller, pH Controller Connect and pH Controller Wi-Fi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple swap\u003c\/strong\u003e – unscrew the pump cover and twist the cassette off the drive motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrings a tired pump back to rated output\u003c\/strong\u003e – about \u003cstrong\u003e120 ml\/min\u003c\/strong\u003e on PeriPod M-series pumps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeeps the motor in service\u003c\/strong\u003e – only the part that wears is changed\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDosing That Slows Down or Stops\u003c\/h3\u003e\u003cp\u003eA peristaltic pump works by squeezing a flexible tube between rollers, and that tube has a finite life: Bluelab rate it at \u003cstrong\u003emore than 750 hours of pump running time\u003c\/strong\u003e in the PeriPod. As it wears, or if the cassette is damaged, each dose delivers less than the controller asks for. The signs are pH or EC taking longer and longer to correct, a pump that fails calibration, or a motor you can hear running while the cassette does not turn. Left alone, an under-dosing pump leaves the reservoir off target and plants pay for it in \u003cstrong\u003epoor nutrient uptake\u003c\/strong\u003e. Bluelab's own troubleshooting step is to check the pump's output and replace the cassette if it is low.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRinse first:\u003c\/strong\u003e run clean water through the pump and tubing so no acid, alkali or nutrient concentrate is left inside.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower off\u003c\/strong\u003e the PeriPod or controller before touching the pump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e the pump cover, then twist the old cassette to release it from the drive motor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit\u003c\/strong\u003e the new cassette onto the motor the same way round, refit the cover and reconnect the dosing tubes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrime and recalibrate:\u003c\/strong\u003e prime the pump, then recalibrate PeriPod nutrient pumps with the liquid each one doses.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart:\u003c\/strong\u003e Bluelab Replacement Pump Cassette Small\/Medium (Bluelab code PUMPCASS-SM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContains:\u003c\/strong\u003e rollers and internal peristaltic tubing in one unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump size:\u003c\/strong\u003e Bluelab 10–120 ml\/min pumps only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with:\u003c\/strong\u003e Bluelab PeriPod M3, PeriPod M4, pH Controller, pH Controller Connect, pH Controller Wi-Fi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot compatible with:\u003c\/strong\u003e PeriPod L3 (uses the L-series cassette)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeristaltic tube life:\u003c\/strong\u003e more than 750 hours of pump running time (Bluelab, PeriPod M-series)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e not included – the cassette fits the existing drive motor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eDoes it fit the PeriPod L3?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. The L3 runs 1,200 ml\/min pumps and takes Bluelab's larger L-series cassette. This cassette is for the 10–120 ml\/min pumps on the PeriPod M3, M4 and Bluelab pH Controllers.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eIs the pump motor included?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. This is the cassette only: the rollers and internal tubing. The drive motor stays on your unit; Bluelab supply the complete pump and cassette assembly separately.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eHow do I know the cassette needs replacing?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eIf a pump's output is low or it fails calibration after you have ruled out kinked, blocked or split tubing, or the motor runs but the cassette does not turn, replace the cassette.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003ch3\u003eWorks Well With\u003c\/h3\u003e\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/bluelab-m3-peripod\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/nutrient-mangement-bluelab-m3-peripod-29227154800824.jpg?v=1785319092\u0026amp;width=160\" alt=\"Bluelab PeriPod M3\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab PeriPod M3\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eEach of its three pumps takes this cassette\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/bluelab-ph-controller-wifi\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-ph-controller-wifi-1.png?v=1790163805\u0026amp;width=160\" alt=\"Bluelab pH Controller Wi-Fi\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab pH Controller Wi-Fi\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eIts dosing pump uses this cassette\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/bluelab-ph-controller\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-ph-controller-1.jpg?v=1790163811\u0026amp;width=160\" alt=\"Bluelab pH Controller\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab pH Controller\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eIts dosing pump uses this cassette\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":53929890545930,"sku":"NUT-BLUE-013-01","price":67.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-pump-cassette-small-medium-default-title-1.jpg?v=1792261681","url":"https:\/\/hydrocropshop.co.uk\/products\/bluelab-pump-cassette-small-medium","provider":"Hydro Crop Shop","version":"1.0","type":"link"}