SIMPLE BLUE SPA Simple Blue Simple SpaSimple Blue lifts biofilm, calcium, and scale build-up for removal by your spa filter – and making your spa water silky smooth in the process. Use With: Hot Tubs and Spas Product ResourcesHot Tub Startup & MaintenanceBefore you take your first soak, make sure you’ve properly prepared the water with the right chemicals. Read ItThe Six Keys to Basic Spa Care [Video]Hot Tub Maintenance Guide [PDF]This guide walks through Hot Tub Start Up as well as recommended weekly, monthly and quarterly maintenance for your spa. Download Guide (PDF) How to Use Simple Blue Simple SpaAdd Simple Spa weekly to your hot tub. Dose is based on hot tub water capacity.Hot Tubs up to 400 gallons: add 8oz per week (¼ of the bottle)Hot Tubs 400 – 600 gallons: add 11 oz per week (⅓ of the bottle)Hot Tubs 600 – 800 gallons: add half a liter (½ the bottle) Related Products SpaGuard Spa CompleteKeep your waterline clear, soften, and clarify your water with SpaGuard Spa Complete. Simple Blue Filter CleanerSimple Blue Filter Cleaner removes scale, dirt, and debris from the spa’s filter with tablets that dissolve in water for easy soak application. Simple Blue Fresh StartSimple Blue Fresh Start naturally removes phosphates, heavy metals, and other debris to start your spa off right.