I imagine it depends how you keep up on water changes
Looks like a barb or carp almost
The risk in repurposing existing furniture is that it's not always intended to hold that kind of weight, especially if it shifts, such as during water
Will do. The "stand" is a mid-mod Lane table I "secured" from my wife's furniture collection . It's low enough for my son
Just make sure it's an LED fixture intended for plants. The ones that are, are hundreds of dollars for a 55g tank.
Like said, goldfish