My 125g future mixed reef build

[Ro Bow]

Hello, i am planning a 6ft 125 gallon mixed reef aquarium that i will get this black friday. This will be my first saltwater tank. This is my plan so far:

Also how many gph for the tank?

Supplies:

Tank/Stand: Petsmart 125 gallon tank/stand combo
Live sand: 120 pounds
Live rock: 120 pounds - Caribsea
Filter: Polar Aurora 525 GPH
Heater: 500W
Lights: 3 Nicrew 150W Lights'
Ro/Di: 1 Ro/Di unit
4 battery powered air pumps: For emergencies
Magnesium addative
Sea chem denitrite
Refractometer
Ph increaser
Ph decreaser
Salifert test kits: Copper, calcium, alk, phosphate, magnesium, ph, ammonia, nitrate, nitrite
Copper addative
Skimmer
Fish net
Algae scraper
40 oz epoxy
5g bucket
Instant ocean sea salt mix
12 oz Original rods food
8 oz Herbivore frenzy LRS blend
Aqueon water changer 25 feet long

Live stock:

Fish:
1 Royal gramma basslet - live aquaria
1 blue tang - live aquaria
2 occelaris clownfish - pick up from petco
1 canary blenny - live aquaria
1 firefish - live aquaria
1 one spot foxface rabbitfish - live aquaria
1 yellow pyramid butterfly fish
1 blue neon goby - live aquaria

Invertebrates:
20 astrea snails - live aquaria
24 blue legged hermit crabs - live aquaria
1 pincushion urchin - live aquaria
2 fighting conch - live aquaria

 

[count krunk]

You're not going to want to put medications into your display tank.

Have you considered using a sump?

 

[Ro Bow]

i want to, but i dont know what i need and how to build it. Plus i dont now if my tank has space for it.

 

[Ro Bow]

You're not going to want to put medications into your display tank.

Have you considered using a sump?

how much gph for the tank?

 

[count krunk]

Your tank definitely has space for an overflow. Before you go any further check out Bulk reef supply's new to reefing videos on youtube