The Shocking Truth About Rainwater Tanks No One Told You

March 11, 2025

What No One Told You About Rainwater Tanks—And Why It Matters

Rainwater tanks seem like one of those things you set and forget, right? Install it, let the rain do its thing, and boom—free water for your home and property. But hold on! There’s a hidden side of rainwater tanks that most people never consider… until they’re standing in ankle-deep sludge, wondering where it all went wrong.

Your Tank Isn't As Clean As You Think

Ever taken a peek inside your rainwater tank? If not, brace yourself. Over time, tanks can become a breeding ground for all sorts of nasties—sediment build-up, algae, and even the odd unlucky critter that found its way in but never found its way out. 🤢

If you’re drinking or using this water around your home, a poorly maintained tank can be more than just gross—it can be a health hazard. A regular clean-out and proper filtration can make all the difference.

Yes, Your Water Can Run Out Faster Than You Expect

Ask anyone who has relied on rainwater alone and they’ll tell you—it disappears quicker than you realise. Long dry spells, an unexpected increase in usage, or even a sneaky leak can leave you high and dry when you least expect it.

Knowing the true capacity of your system versus your household’s needs is a game-changer. A backup plan, such as an extra tank or additional water sources, can save you from emergency water runs.

Your Gutters Are The Real MVPs

Most people don’t think about their gutters until there’s a blockage the size of a small rainforest causing water to cascade down the wrong way. But here’s the thing—your gutters are what feed your tank. If they’re clogged with leaves, dirt, and who-knows-what, that’s exactly what’s ending up in your tank.

Investing in gutter guards and scheduling regular clean-outs can prevent this problem before it starts. Cleaner gutters = cleaner water. Simple.

Plastic, Steel, or Concrete—Your Tank Material Matters

Not all water tanks are built the same. Plastic tanks are lightweight and affordable but may degrade over time if not UV-protected. Steel tanks are tough but can corrode without a good liner. Concrete tanks offer durability but can leach minerals into your water if not sealed correctly.

Choosing the right tank for your specific conditions can save you headaches (and costs) down the track.

Stormwater Overflow: The Silent Destroyer

Ever noticed puddles forming around the base of your tank? That’s stormwater overflow, and it can erode foundations, create swampy areas around your property, and even cause structural damage if ignored long enough.

A properly designed overflow system will direct excess water safely away from buildings and high-traffic zones. It’s one of those things you don’t think about… until you wish you had.

How To Keep Your Tank Water Fresh & Safe

If you’re relying on tank water for drinking, cooking, or even washing, keeping it clean isn’t just a “good idea.” It’s a necessity. Here’s how to make sure your water stays as fresh as a summer rain:

Regular Tank Inspections: Check for cracks, leaks, or signs of contamination.
Leaf & Debris Protection: Keep gutters clean and add filters at entry points.
Sludge Removal: Every few years, give your tank a proper clean-out.
Filtration & Treatment: Consider UV treatment, filters, or chlorine dosing (where needed).
Water Level Monitoring: Stay aware of how much water you’re actually using.

The Right Gear Makes All the Difference

Rainwater tanks are fantastic, but they need the right setup to work effectively. The last thing you want is to battle poor water flow, contamination, or constant maintenance headaches. That’s where getting the right equipment—like first-flush diverters, quality pumps, and proper filtration—can take the stress out of managing your water supply.

If you ever think, "There’s got to be an easier way to keep my tank running properly," you’re absolutely right! A few smart upgrades can make all the difference.

Know Your Tank, Save Your Hassle

Rainwater tanks are brilliant for capturing and using one of nature’s best resources, but only if they’re looked after properly. A little attention today means fresher water, a more reliable supply, and one less worry when the dry season hits.

Need the gear to get your tank working at its best? We’ve got you covered with the fittings to keep your system running smoothly. Visit us in-store for the real-deal advice you won’t get at the big chains.

Chat soon, Candeece