You’ve done the hard work- visited the local stores across Melbourne, picked out your tank and finally decided on your fish. But now you are facing the most confusing part of the setup: Lighting.
If you have started googling, you are probably more confused than when you started. Watts, Spectrum, Kelvins etc… such words are enough to confuse you. In a city like Melbourne, where we spend a lot of time indoors during those chilly winters, a well lit aquarium is a beautiful
centerpiece. This blog is a guide to help you choose the right light without the technical headache.
Why does lighting matter?
Before you buy, understand that lighting is not just for “looking good.” It serves two main purposes:
- For your fish: It establishes a day/night cycle, which keeps them stress-free.
- For your plants/corals: It acts as “food.” Without the right light, they can’t grow.
Factors you must consider:
1. What’s inside your tank?
The “best” light depends on your residents.
- Fish-only Tanks: Here you just need a light that shows off their colours. Basic LEDs are perfect.
- Planted Tanks: Think of light as “food” for your plants. They specifically crave red and blue tones to stay lush and green. Look for lights labelled “Full Spectrum”- it’s basically a balanced diet in light form.
- Marine/Reef Tanks: These need high intensity blue light to mimic the ocean depths.
2. Tank Depth & Dimensions
This is a big one. Light loses strength as it travels through water. If you bought a deep/tall tank, a cheap, weak light won’t reach the bottom. You need something with enough “punch” to reach the plants at the very bottom of your substrate.
3. Melbourne Summer & Heat
In Melbourne, we get those hot summer days.
- Avoid the Window: Never rely on natural sunlight. It is inconsistent and can cause an uncontrollable algae explosion and overheat your tank.
- Choose LEDs: Old-school glass tubes get very hot. Modern LEDs stay nice and cool. This is a lifesaver during a Melbourne heatwave, as it prevents your light from accidentally “cooking” the water and stressing out your fish.
4. Consistency
Just like us, fish and plants love a routine. Leaving the light on for 24 hours can lead to a massive algae breakout. So a schedule of 8-10 hours of light a day is quite good.
- Pro Tip: Get a simple plug-in timer so the light turns on and off at the same time every day automatically. Your fish will get their ‘sunset’ at the same time every night, even if you are not home.
5. Species Specifics
Some fish come from dark, murky rivers and actually hate bright lights. Others thrive in sunshine. Make sure the light intensity matches the fish’s natural habitat.
6. Balancing your Budget
Setting up a tank can be expensive once you have paid for the glass, the filter and the livestock. You don’t need the most expensive “smart” light to have a healthy tank.
- Budget-friendly: Look for fixed LED strips. They are energy efficient and do the job for most beginners.
- Investment: If you plan on growing difficult plants, spending a bit more on a “Full Spectrum” light now will save you money on replacing dead plants later.
Quick Reference Guide
| Tank Type | Recommended Light Color | Duration |
| Fish Only | Standard White LED | 8 Hours |
| Planted Tank | Full Spectrum (WRGB) | 8-10 Hours |
| Marine/Reef | Actinic Blue / High Intensity | 10-12 Hours |
Don’t let the technical words and internet search scare you. If the light reaches the bottom of your tank, fits your budget and is kept on a steady timer, your aquarium will thrive. Start simple, observe how your fish react and enjoy the view!