APT 3 is a complete all-in-one liquid fertilizer for plant-heavy aquariums. It delivers full NPK (nitrogen, phosphorus, potassium) alongside magnesium, iron, and a broad spectrum of micronutrients in a single daily dose. Used by award-winning aquascapers in over 20 countries, APT 3 is the go-to choice for aquariums with demanding and fast-growing plant species. Compared to conventional fertilizers: 3 times more concentrated (in total soluble elements per ml), with 2 times lower relative nitrogen for richer coloration, and components up to 50 times more bioavailable across a wide range of pH values. Who is APT 3 for? Aquariums with more plants than fish Planted tanks with or without CO injection Nano tanks and standard aquariums from 30 to 400 liters Anyone looking for a simple, effective fertilization routine without complex dosing strategies Dosing 3 ml per 100 L daily Recommended water change: 30% weekly 300 ml (with pump) 3 months for a 115 L tank 500 ml 3 months for a 190 L tank APT series comparison Product Best for NPK CO needed? APT 1 Fish-heavy tanks, new tanks with aquasoil No NO/PO No APT 3 Plant-heavy tanks, balanced aquascapes Full NPK Optional APT e High-tech, EI method High NPK Yes Pair with APT Jazz for root feeding in mature aquasoil APT FIX if algae appear APT Pure water conditioner for water changes
