Choosing the right substrate and decor for your aquarium is where a lot of people get carried away—fancy gravel, bright colours, random ornaments—and then wonder why the tank doesn’t feel right or becomes hard to maintain.
Substrate: It’s Not Just for Looks
Your substrate (gravel or sand) isn’t just decorative. It actually affects your water and how easy the tank is to clean. In most cases, keep it simple. A natural-looking gravel or sand works best and keeps things stable.
Super fine sand can look great, but it can also trap waste if you don’t maintain it properly. On the other hand, really chunky gravel lets waste fall through, which can build up over time if you’re not cleaning it regularly.
If you’re keeping fish like goldfish or cichlids, go for something practical. These fish move things around, dig, and create waste—so you want a substrate that’s easy to clean and won’t cause issues. Picking looks over function just creates more work later.
Decor: Less Is More
You don’t need to fill every corner of the tank. Fish need space to swim, not a cluttered obstacle course. A couple of solid pieces—like driftwood, rock, or a simple feature piece—is more than enough. It looks cleaner and keeps maintenance easier.
Not all decor is aquarium-safe either. Cheap ornaments can leach into the water or cause problems over time. If you’re adding rocks or wood, make sure they’re suitable for aquariums. Some materials can actually change your water parameters—especially pH and hardness—which affects your fish without you even realising.
Match Your Setup to Your Fish
Your substrate and decor should make sense for what you’re keeping. Different fish prefer different conditions, and even the materials in your tank can influence things like GH, KH, and pH. It doesn’t have to be complicated, but it does need to be intentional.
Keep It Clean and Balanced
A clean, simple setup always wins. It looks better, runs better, and is much easier to maintain long term. You don’t need the flashiest tank—you just need a balanced one.
If you’re in Melbourne and not sure what works best for your setup, Aquatics By Ash can help you choose the right substrate and decor, set it up properly, and keep everything running the way it should—without the guesswork.