I need Help

[RomaFan]

I check my ro/di water paramters before I mix the salt and after with neglagable parameters, so thats not where its coming from. Changing all the water? how would my corals do under those circumstances?

[craigwmiller]

Most corals can handle significant amounts of time out of water. Walking/snorkling the beach in Hawaii personally confirms this -- many corals are exposed to the air/sun for HOURS each day.

I would just make sure you have the make-up water ready, and then just do it.

IMPORTANT though, is not to disturb your sandbed - since anything in there would get stirred up.



Regarding the deep sand bed releasing nutrients, this is likely the case also. There are many thoughts on the matter, but personally I prefer a shallow sandbed (1-1.5"), which I then have a sleeper goby to constantly stir it up to keep things clean and nutrient-free. If you are interested in removing/cleaning your sand -- I would recommend doing it SLOWLY so not to disturb it too much and release many nutrients too quick. Say remove a cup every few days/etc. If you do it gradually enough, you should not have an issue.

[Proteus]

Did you keep the foam inserts in back of tank if there is any. If so organics fills up the foam and will make nitrates.

[RomaFan]

Everything is removed from the compartments in the back. I only have a heater and intake and return from the skimmer. The only thing that is really disturbing the sand bed is the pistol shrimp.

[Proteus]

I would then consider removing most of the sand as Craig said.

[neoh]

I had 30~ppm nitrates for a long time. I was recommended Nitra-Guard Bio Cubes from J&L, and within a week my nitrates were down to between 5-10ppm (which I like to keep it there.)

http://www.jlaquatics.com/phpstore/s..._ID=plb-ng0500

Works pretty well! Just put them in a bag and throw them in the back!

[craigwmiller]

Originally Posted by neoh

I had 30~ppm nitrates for a long time. I was recommended Nitra-Guard Bio Cubes from J&L, and within a week my nitrates were down to between 5-10ppm (which I like to keep it there.)

http://www.jlaquatics.com/phpstore/s..._ID=plb-ng0500

Works pretty well! Just put them in a bag and throw them in the back!

The only caution I would have to this method is that if you don't remove the source of nitrates they will come back. Be it source water, sand bed, filter floss, over feeding, etc.

In RomaFan's case, water is already being changed and it's not helping, so the source is very active and removing the source needs to happen first, then a massive water change afterwards!

[neoh]

Originally Posted by craigwmiller

The only caution I would have to this method is that if you don't remove the source of nitrates they will come back. Be it source water, sand bed, filter floss, over feeding, etc.

In RomaFan's case, water is already being changed and it's not helping, so the source is very active and removing the source needs to happen first, then a massive water change afterwards!

This is very true.

If it were me, I would vacuum up as much of the sand as I could, while removing it, then complete a 90% waterchange.

High nitrates like that in such a small system should be manageable.

Have you checked the nitrates of the water out of the tap?