Is ro purified water suitable for betta fish?

The sub forum dedicated to one of the most incredible fish in our hobby. Betta ask your questions in here!
Post Reply
User avatar
flumon
Posts: 31
Joined: Fri Jan 07, 2022 3:30 pm

Is ro purified water suitable for betta fish?

Post by flumon »

RO water for bettas, is it good or bad? I see some people using RO water for their betta, what's the deal with that?
User avatar
coltin
Posts: 864
Joined: Fri Jan 07, 2022 6:07 pm

Re: Is ro purified water suitable for betta fish?

Post by coltin »

You can use reverse osmosis water for bettas, but they're more susceptible to infections in very soft water and the pH tends to drop. Not ideal for growing baby fish either.

Reverse osmosis water is essentially pure water, stripped of minerals. But bettas need some minerals like calcium and magnesium to stabilize pH and develop strong skeletons. They don't need much, just a bit.

It really depends on your tap water - how hard it is and if it's contaminated. If you have very hard water (over 400ppm), mixing some RO water with tap water can be beneficial. A 3:1 ratio of RO to tap water can get you a nice GH of around 100ppm, perfect for bettas, gouramis, tetras, and other similar fish.

But if your tap water is soft (under 150ppm) and lacks minerals, using RO water is pointless. Unless, of course, you have chemicals in the water, in which case an RO unit can help remove them. Activated carbon can also do the trick, and it's often cheaper. Just make sure to get the good stuff - Highly Activated or Activated carbon.

Keep in mind that RO units waste a lot of water. The best ones have a 1:1 ratio, but most waste 2-3 liters for every liter of clean water. If water's scarce, carbon might be a better option.

If you can test your water's hardness, that'll give you a better idea of whether you need RO water or not.
User avatar
flumon
Posts: 31
Joined: Fri Jan 07, 2022 3:30 pm

Re: Is ro purified water suitable for betta fish?

Post by flumon »

You can use reverse osmosis (R/O) water for Bettas, but be aware that they're more susceptible to bacterial infections in very soft water, and pH levels can drop. Additionally, R/O water isn't ideal for growing baby fish.

R/O water is essentially pure water with no minerals. However, some minerals (like calcium and magnesium) are necessary for pH stability and for baby fish to develop strong skeletons. They don't require a lot, but some is essential.

The hardness of your tap water and the presence of pollutants will determine whether you should use R/O water. If your tap water is very hard (GH over 400ppm) with plenty of minerals, mixing some R/O water with tap water can create better conditions for your fish. A 3:1 ratio of R/O to tap water will result in a GH of around 100ppm, which is suitable for Bettas, gouramis, tetras, Corydoras, rasboras, and loaches.

On the other hand, if your tap water is soft (GH under 150ppm) with few minerals, using R/O water is unnecessary. However, if your tap water contains chemicals (other than chlorine), a reverse osmosis unit can filter them out, making the water safer for people, animals, and fish. Alternatively, using carbon can remove these chemicals at a lower cost. If you opt for carbon, choose Highly Activated or Activated carbon, as they're more effective than regular carbon.

Keep in mind that reverse osmosis units waste a significant amount of water. The most efficient units have a 1:1 ratio, wasting 1 liter of water to produce 1 liter of clean water. Most units, however, have a 2:1 or 3:1 ratio, wasting 2 or 3 liters of water to produce 1 liter of pure water. If water is scarce (e.g., you live in a desert), using carbon is a better option for removing chemicals, and a reverse osmosis unit might not be the best choice.

If you can test your water's hardness (GH), that will give you a better idea of whether you need to use R/O water.
User avatar
coltin
Posts: 864
Joined: Fri Jan 07, 2022 6:07 pm

Re: Is ro purified water suitable for betta fish?

Post by coltin »

Adding Indkento4 almond leaves to R/O water will indeed release tannins, but these tannins won't increase the water's hardness or add any mineflakes. Think of it like brewing a cup of tea - the hot water brings out the tannins from the tea bag, resulting in that familiar brown color. The tannins are simply plant chemicals that stain the water, but they don't contribute to the GH.

If you're using R/O water, it's a good idea to add some mineflake salts to bump up the GH slightly, depending on the type of fish you're keeping. I'd recommend using Rift Lake water conditioner to increase the GH - it's a great product for this purpose.
Post Reply