No DI = Cyno?????

[NasotheHutt]

I have never had a major problem with cyno....untill now. I used to use a water purifier DI unit. Recently I switched to a Kent RO unit, but no DI. I also started adding Kents 2 part calcium additive. Would either one of these cause a MAJOR cyno problem?

Tank params:
Temp 79
Ammonia 0
Nitrite 0
Nitrate 10
PH 8.0-8.1

 

[AnotherGoldenTeapot]

The tank parameters you have given are fine. The one you need to look at is your phosphate level.

It's possible to introduce cyano along with a new coral / fish. This happened to me once - I noticed shop had a minor outbreak - bought fish home - I got a minor outbreak too.

RO removes say 95% of the pollutants in your water. The remaining 5% may be enough to cause a problem. A final DI stage will remove almost everything that the RO stages have not.

 

[Mouse]

Then theres the ultimate Kent RO/DI Hi-S. This has silicate removeal too, another reason for algal blues.

 

[Anonymous]

hi.
What happened to the DI unit? Can you put the DI after your RO to make the water even better?

 

[NasotheHutt]

I'm going to do that tonight. However the unit I have cannot handle the pressure needed to shut off the R/O via the selenoid. I'll just half to keep an eye on it. I just cant figure out why cyno is taking over everything. My frogspawn only opens up half way now. I'm going to drain my RO resivor tonight, and re-fill with the DI attached, and do a water change, hopefully this will help. Will a 100g water change on 500g of volume be enough?

 

[AnotherGoldenTeapot]

If you're planning to plumb something in permanently then all you need is:

Standard 10" filter housing

2 quarter inch male threaded to John Guest ports (threaded end goes into the filter housing and leaves you with a push on John Guest port - use a little teflon tape on the thread to ensure it is water tight)

A DI cartridge for the filter housing.

A few feet of 1/4 inch flexible water pipe.

Then just plumb in the canister between the final stage of the current filter and the storage tank (if you have one) - you don't want this after the storage tank as the flow rate will be too high.

 

[Anonymous]

hi.
Now that's an awefully big reservior for a 100g water change!

Are you going to waste the RO water in the reservior? You can drain the water into a DI unit, and have RO-DI water instead of storing RO-DI water.... Can't picture your setup well, so don't know if anything will help.

 

[sparks]

Hi Naso, I've had cyno come and go 3 or 4 times over the last couple years for NO apparent reason.
I got rid of it by getting out the turkey blaster and blasting it into the water column and letting a cannister filter pick most of it up.
Do this at least once a day or more is better.
I'm positive it would go on its own evenually, but none of us can wait that long.