I don't know about the Spec V tanks but I do know that the NPT I started in a 10 gallon is thriving in low and medium light. The tank is a Tetra 10 gallon with LED hood. the tank is heavily planted. Some of the plants I chose were bunch plants with no roots. and some of the others like my Banana plants have grown roots and are also blooming. Just remember to use good Substrate (mineral rich) and I add API CO2 boost every day. I have never used any other fertilizer in this tank.