Thanks for all the comments and compliments!
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Final Plans:
Because of my new study I'll start I will stay a poor student for the next 5 years

That means I can't affort a larger tank, esspecially when I move to my own appartement. Costs will be $ 150 an month... And that is too much.
That's why I will start a large Propagation-Forest tank. The order is already placed, so this plan is really the last one

I promise!
Dimentions: 63" x 43" x 14"
Lighting: 2 x 400 Watt SE Aqua-Connect 14.000 K - in Lumenarcs on a light mover
Skimmer: BK Supermarine 250
Flow: 4 x Tunze 6101 +
Tunze Wavebox
Other:
Schuran Jetstream II by-passed with 30 Gallon Vessel for much more reaction time.
Schuran
Kalkwasser Reactor
Grotech TEC III 3-channel dosing pump
Grotech one channel dosing pump
DIY GAC+GFO reactor
- The hood will be force ventilated with a high capacity ventilator (to ventilate whole houses)
- capacity for over 1200 Fragments
- An additional sponge-propagation will be connected to sell as frozen food for food-specialists. (such as Angels and certain snails)
- The right side of the tank will be used to place my staghorns and will be used for the mother-colonies.
I will start building the stand soon (after my fractured knee has healed

)
~Thanks for reading, Leonardo