Description
AUTOPOT 47 LITRE TANK is the large-capacity nutrient reservoir for AutoPot passive watering systems, providing UK growers with the extended nutrient solution volume needed to sustain multiple plants or a full AutoPot system installation without requiring frequent refilling. We have been recommending AutoPot reservoirs to UK growers since 2017 as essential infrastructure for building a properly scaled, low-maintenance passive watering growing system.
Why Reservoir Sizing Is Critical for Passive Watering System Performance
The AutoPot passive watering system operates on gravity pressure from an elevated reservoir — the volume of the reservoir determines how long the system can run unattended between refills. An undersized reservoir for the number of plants it must supply requires frequent, disruptive refilling that undermines the low-maintenance advantage that passive watering offers. The 47-litre tank provides sufficient capacity to sustain a typical 4-8 plant AutoPot installation for several days to a week depending on plant size, growth stage, and ambient temperature — the larger the plant and the hotter the environment, the faster solution is consumed. At peak summer growing or during late flowering when plant water demand is highest, a 47-litre reservoir gives growers the extended independence that makes passive watering genuinely hands-off for extended periods. The large format tank also benefits from the concentration stability of a large solution volume — EC and pH are more stable in a large reservoir than in a small one where each plant uptake event makes a proportionally larger change.
Connection, Positioning, and AutoPot System Integration
The AutoPot 47-litre tank includes the fittings needed to connect to the standard AutoPot distribution tubing network. Position the tank elevated above the pot tray level — the height difference is what provides the gravity pressure that drives the AQUAvalve operation. Ensure the tank is stable and on a surface that can support its weight when full — 47 litres of nutrient solution weighs approximately 47kg. Mix nutrients to the target EC and pH in the tank, then allow the AQUAvalve system to manage delivery automatically. Replenish the tank by refilling with fresh, correctly mixed solution — avoid topping up with straight water or concentrate that would alter the EC of the remaining solution without accounting for its volume. Browse our full AutoPot system range for complete system kits, additional tanks, and accessories.
Browse the full range: Explore our complete New Products range at The Horticulture Company. Also in this range: IONIC CALMAG PRO, UGRO XL BASIC 70LITRE, EXHALE CO2 BAG, PLANT !T YOYO (PACK OF 8).



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