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Agree with JDA, Cut yourself a big piece of cardboard, larger than the footprint of your tank. Stay inside the actual footprint 2" all the way around, then get your rocks and start building an aquascape. One other BIG lesson is to always set your rocks on the glass bottom when ready to put in the aquarium, THEN add your sand (preferably live sand) The reason for this is then the rocks will be stable, where on top of the sand they would be very subject to shifting.Hi, would love your best tips as just about ti set-up my first one.

THEN add your sand (preferably live sand)
Totally agree. I will add one thing. Quarantine tank with proper quarantine procedure. Every single fish live in my quarantine tank with proper treatment for 2 and half months before I move it to the display tank.Patience. “nothing good happens fast in a reef tank”
That and a good wet dry vac. Bad Things do happen.
My first tank years ago was a used tank and sump that I picked up from someone getting out of the hobby. I learned the hard way when I had my first power outage and the sump overflowed. My wife was not happyPlan for redundancy/safety where possible. Some thoughts include:
- Sump
- make sure your sump is large enough to handle all the water above the drain line in your display without flooding in the case of a return pump failure or power outage
- make sure the waterline in your display is low enough so that if your drain(s) get clogged your display won't overflow, and also have at least 2 drains, main and emergency, in the first place as a preventative measure
- Heaters
- have more than one temperature checking device and check them all regularly
- if feasible, have 2 heating elements, and if you only have one try to have a second one on standby
- don't place your heater somewhere is can run dry, such as the return chamber of a sump
- ATO
- make sure your ATO reservoir is large enough to handle top off for the maximum amount of days you may forget to refill it
- if the waterline in your ATO reservoir is higher than the water level where it drains into, make sure you have a siphon break
- RO/DI
- use a float valve to shut it off automatically
- set a timer on your phone/whatever timing device if you don't have a float valve to remind you when to shut it off
- Have enough RODI stored for emergency water changes, replacement of water after a leak, making new saltwater for any number or urgent situations
- General
- Have reef-safe container(s) on hand for emergency livestock storage, quarantine, acclimation, etc
- make sure your devices have drip loops in the wires
- use GFCI/surge protect power strips, better yet GFCI/surge protect smart power strips with app control per outlet
- if you have or plan to keep anemones, make sure your internal display pumps are properly protected
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