APT E - Estimative Index

2Hr Aquarist APT E is perfect for heavily planted, Dutch Style aquascapes and users who understand Estimative Index methodology. The EI approach pioneered by Tom Barr is designed to provide an unlimited / unconstrained amount of nutrients to plants based on a professionally Estimated Index of their needs. APT E provides a calibrated version for richer colouration and algae control. This supremely concentrated and expertly balanced liquid plant food is ideal for use with heavy stemmed aquascapes. APT E will vastly increase plants growth rates, in turn greatly increasing the required maintenance frequency - it should therefore only be used wisely by experienced aquascape enthusiasts.

POWER
APT contains 5X the amount of Phosphorus (P) and 6X Potassium (K) per ml relative concentration when compared with a 50-year old European 'big brand fertiliser'. That is like having 5 shots instead of 1 in your morning espresso, if you are into coffee.

BALANCE
Simply 'more' is not necessarily better. Lower Nitrogen (N) delays chlorophyll production and induces richer colours, to a point. Nitrogen is also critical for plant metabolism. The APT formula pushes the boundaries of that trade-off, maximising colour before diminishing returns.

FORM
Similar to food labels, 20% protein or 1% Iron tells very little about actual absorbability rate, efficacy and impact. APT's components are up to 50X more absorbable, and accessible across a wider range of pH and other water parameters.