Troubleshooting your Saltwater Reef RO/DI System

Helpful information when troubleshooting your RO/DI System

Milky colored water.

This is normal for a new system and will go away after a week or so. If this
continues beyond that time please contact us.


Drain keeps running.

There are several reasons why this might happen. #1 – You may have purchased
a system that does not include an auto shut off system. If you are unsure, please contact our
support department. #2 – Your system pressure may be too low and you may need a booster pump for
your system to operate correctly. #3 – Your system may have a clog or a leak. Check to make sure
that all of your hoses are free of kinks and there are no puddles around the system.


Funny taste or smell.

If your system begins to put off a fowl odor, you may need to change filters
and or sanitize the system with a mild bleach and water solution. If this is not the case you
should check the TDS after the membrane. If the TDS after the membrane reads high you will need to
change the membrane and clean the membrane housing.


Slow Production.

If your system is producing less than the rating of the system there are several
things you can do to troubleshoot the problem. #1 – Your water pressure may be too low and the
addition of a booster pump may be needed. #2 – Your prefilters may be clogged, try removing the
first two filters on your system (Sediment & Carbon) one at a time until the pressure returns to
normal. Once you have found the problem filter, replace it. #3 – If it is nearing the 6 month
period from the day you purchased your system, the prefilters need to be replaced according to
schedule so this may be the problem.


DI filter changed color.

This only applies to systems that have a DI chamber (RO DI). If your
system is RO only this does not apply to you. The Di that comes with your system is a color change
indication resin. This means that as the filter becomes exhausted the filter will turn from blue,
green, or purple to gold. When the filter has changed completely to gold it is exhausted and needs
to be replaced. However, due to the fact that the color change indication is not always accurate,
you may wish to use a TDS meter to judge the exhaustion of your filter.


DI canister not filling with Water.

This is completely normal and the filter is functioning
normally. Unlike the filters before the membrane, this filter is being fed by a very slow input of
water. The water that is going in to this stage is being fed from the bottom of the filter through
to the top. The other filters are fed through the walls of the filter and the water is then
channeled up through to the top of the housing from inside the filter. The up flow design of the DI
filter along with the slow process of the RO water feed allows for superior contact time with the
DI resin and allows extremely high quality product water.

If your problem was not addressed in this section, please contact our customer
support department at 1-866-592-3713 or email us at support@purelyh2o.com

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