• Johnny

I am planning to get a marine aquarium, as I have outgrown freshwater. Preface: The tap water is terrible. The TDS is 1000 units or more. For freshwater, I use bottled water (relatively inexpensive). I have a question: Will reverse osmosis give me the desired water quality for further use in a marine aquarium? From what I have read, the conclusion is that to achieve a TDS of 10-20 units from reverse osmosis without using ion exchange resins, the input water should not exceed 400 units. The question is whether to purchase a reverse osmosis system or a distiller.

Keith7534

A good membrane has a selectivity of 98%. We are reducing from 700 to 30 ppm.

Joseph8592

The water in our city is mediocre. After osmosis, it shows around 8 ppm. Some say that this is quite acceptable for the sea, but I didn't hesitate, bought an empty flow cartridge for ion exchange resin and the resin itself separately, and installed it in the outlet tube. The result is 1 ppm! The cost is around 300. I think it's worth being cautious, especially if the aquarium is not 60 liters, but more.

Mark9853

Make sure to use osmosis + resin, the output should be 0. Or you can grow in a swamp, many people like that too.

Gabrielle5053

Is there a cartridge for osmosis + resin, or is it separate?

Monica

I have an osmosis system with three cartridges/filters, then a membrane, and then another cartridge with resin - the output is zero.

Mike

you put in + fitting for the flask

Chad4168

I installed a filter on my main faucet and I'm happy. Now I can at least drink the water.

Denise

What are you satisfied with? Self-deception?

Jessica8898

That's right - after osmosis, additional cartridges or resin cartridges are added. I have 2, for example.