• Substitution of water

  • Joshua8425

Is it necessary to replace the water? I have a 900L aquarium without a sump, and with a sump, it's 1100L. Every 3 days, the auto top-off removes 10L of water. I sometimes add salt to the water, and the density remains normal in the aquarium.

Rachel

Are you encountering this for the first time? I think everyone with a marine aquarium should know that water changes are desirable, but the amounts depend on the type of aquarium, its stocking, and its age. In young aquariums, it's usually recommended to change 10 percent once every 1-2 weeks. For mature aquariums, it can be less frequent. Ray PLATAX is actually an advocate of minimal water changes. Check out his post. If you have any questions, feel free to ask.

Amber

The aquarium is only 3 months old; before that, I had a 250-liter tank where I changed about 20% of the water each month and added 3-4 liters weekly (it was hardly noticeable). But now there's such crazy evaporation. The question is, what is the purpose of all this water change? Is it for introducing a fresh batch of salt and trace elements from the entire periodic table, or for removing some organic matter?

Jennifer7159

Mainly for the introduction of fresh trace elements for corals, which is most important if corals are present and not fish. A small amount of organic matter is also removed.

Gregory9432

Regarding the necessity of water changes, I wouldn't be so categorical, as there are many aquariums and ways to maintain biological balance in them. You can change the water, or you can choose not to; I personally know successful SPS aquariums where the water hasn't been changed since the setup and they look good. I also chose the path of maintaining an aquarium without water changes and have been following this for about a year, meaning that only technological losses are replenished, averaging around 20 liters per month for a 500-liter system. However, everything depends on the condition of the aquarium itself, and this method cannot be recommended as an axiom, just as massive water changes cannot be.

Mary

I completely agree with you!

Cheryl

Hello everyone. After four months, I did my first 30-liter water change (aquarium 500). What can I say? The first couple of days after the change, the corals seemed to feel worse. I think the animals experience a bit of stress during water changes...

Thomas5021

Well, there is still some enlightenment on this issue; I understand that a marine aquarium is not a toy, but it shouldn't turn into a punishment either, as you'll be occupied with water changes from morning till night. 100 liters a month for topping up and at least 100 liters for changes, especially since I'm still buying RO water.

Linda

Water preparation and purification is, in my opinion, one of the most important activities related to maintaining an aquarium in proper condition. It is certainly better to prepare the water yourself, and it should be of the highest purity, RO+DI, to ensure its cleanliness. Who knows how and with what it is purified, and then you end up searching for the cause of sudden deterioration, which you may never find.

Jeffery7866

By replacing the water, we mainly pursue one goal: to remove undesirable elements as much as possible and add desirable ones. When you bring the indicators to normal, what difference does it make, as long as the tests do not upset you?

Brandy1134

In small aquariums (Nemo), water changes are essential!