I am doing my first planted freshwater tank. I have a 35 hexagon that is 24 inches (61cm) deep. I have 3 inches (7.5 cm) of "flora max" substrate. I am keeping it simple with some water wisteria, amazon sword, and dwarf hairgrass. I decided to experiment with the light and use an LED spot that is equivalent to 1000 watts and rated in the 5000K spectrum. I got some neon tetras and put in the tank but they just stayed pretty much at the bottom of the tank and around the perimeter so I raised the light up so it is about 18 inches (46cm) above the tank. The fish are now swimming where the should be and very active at it. Any advice if this will work long term?