Top off water?

[tb582]

I need to top off some last water in my tank, maybe 2-3Gal

while I was planning on using RODI water from my local fish store I was reading this site which seems to either be just plain misinformation or I’m reading it wrong…

Can Filtered Drinking Water Be Used in Aquariums - Hygger

Filtered drinking water can safely be used in aquarium systems, and you should look to add back some of the lost good minerals to water in order for fish lives.

www.hygger-online.com

Can I use my regular filtered fridge water? I’m on a well so the entire house already goes through sediment, softening and other removal processes…

 

[bushdoc]

Life is too short to read Hygger articles. I would recommend RODI or distilled water for your Reef tank or even FOWLR.

 

[Fish Styx]

Hard no. Most filtered drinking water is unsuitable for reef aquaria. Depending on the source of the water, it can have any number of contaminates that simply aren't filtered out by, nor removed by basic carbon adsorption. Removing "some" chlorine or chloramines, or even "most" is not acceptable. True, we use RO/DI and aim for 0 TDS. The reason for this, is so that when we reconstitute our salt mixes, our resulting SW has everything we want and nothing we don't. If is is lacking, we add via dosing. When our water evaporates, the dissolved solids that we add, i.e. salt and minerals, remain. Therefor, when adding fresh RO/DI to your system via topoff, your concentrations remain stable. While the use of filtered and reconditioned tap water is suitable for FW aquaria, it is universally frowned upon in SW.

 

[ptrick21186]

Nestle (Ice Mountain) has been caught several times filling their "Spring Water" jugs with regular tap water. Wouldn't just anything I'm not filtering/testing myself