So the 75 project will be quite the undertaking. I have plenty of decisions to make, such as...
What type of scape, including wood/ rock, etc.?
Exactly what to do with lighting?
Should I get an inline heater?
Black or frosted background?
Timing and transitioning from the 55?
Reuse the BDBS from the 55, supplemented with some new?
I am sure there are other things to think of as well. I would also like to make a canopy for this tank. The design is pending on the lighting and how much, if any at all, cooling I'll need. I figured either way there will be open space in the back for ventilation.
One thought for lighting is to use one Beamswork fixture with two T5HO fixtures. This should give good PAR, but also give some flexibility with coloration. The Beamswork would likely be the 6500K DHL, as it would fit in a canopy (DA FSPEC is a bit longer).
I am excited for where this build will take me, but it is bitter sweet. I'll miss the unique scape of the 55 and will need to challenge myself to do something new with the 75.