2Hr Aquarist APT EI (Estimate Index)

The 2Hr Aquarist

is perhaps best known for its Nitrate Limitation Capstone^TM methodology which unlocks richer coloration and stronger growth in aquatic plants. It is an active thought-leader in planted aquarium science. It serves aspiring hobbyists through a suite of high performance products backed by an integrated success system:

The 2Hr Way^TM.

"APT" shorthand for 'Advanced Planted Tank'