What caused PO4

[minsmarine]

I am in war with PO4 ( leading to GHA and a few rock got already ) and still now I could not find where the source is/are.

Tested topup water ( tap water ), 0 in PO4, NO2, NO3. Afew time to make sure no source.

Used 1 whole bottle of Tunze Photo remover ( within 3 days ) and all are still in the sump's return chamber. I was advised to Tunze over Rowa by reputable reefer. So I have no much doubt.

My Macro SP300 ( no needle wheel ) diven by 5K L/Hr pump is giving me mud, need to clear whole collection cup every 2 days otherwise cloged.

LS, I only have

1 Copperband Butterfly

1 White Blenny

1 Yellow Headed Goby

1 Pink Goby ( I don't know the name )

1 Fire Shrimp

My Singnal Goby, and 2 other fishs gone MIA ( no body found yet ) for 2 weeks by now.

Feeding is only 1/3 of brain shrimp a day.

2 x 150w 20K MH on for 10 hrs.

All my SPS are doing fine so far, no color shifting to brown ( some become lighter color from light brown to blue ). All polys extend day and night, getting longer poly than before.

Sup dosgae,

Iodine, Ca, Trace Element once a week.

I did rescape 2 week ago, changed 50% water on that time and measured PO4 1.0. Yesterday, the day before yesterday measured 1.0 same. Even after poured the whole bottle of Ph remover to the sump.

Only thing I can think of was,

I was with UGF with external filter as chemical filter ( running sump as well ), on my last rescape, I tookout chemical filter and put PO4 absorber in the sump. But I didn't take out UGF base which is plastic.

Or fish rotting cause PO4 high ?

Or PO4 absorber is doing job , but PO4 are bounded in the rock/sand b4 ( cause UGF ? )

I am very louzy in Chemistry and failed in my A exam. So need some chemisty expert help.

[lightningstrike]

http://www.sgreefclub.com/forum/index.php?...topic=25095&hl=

[minsmarine]

http://www.sgreefclub.com/forum/index.php?...topic=25095&hl=

Read a few time within this a few week, still in puzzle and strugling lay.

And I am just wonder whether my LR and DSB had been exposed to very high Phosphate levels and may be acting as a phosphate reservoir. If it's , what is the effect way to reduce it other than taking out LR and DSB totally.

[lightningstrike]

Read a few time within this a few week, still in puzzle and strugling lay.

And I am just wonder whether my LR and DSB had been exposed to very high Phosphate levels and may be acting as a phosphate reservoir. If it's , what is the effect way to reduce it other than taking out LR and DSB totally.

read the link to advanced aquarist.

http://www.advancedaquarist.com/issues/sept2002/chem.htm

[minsmarine]

read the link to advanced aquarist.

http://www.advancedaquarist.com/issues/sept2002/chem.htm

Sorry I mean I read that article not the linke

So many time and still could not find the cause.

I am using Salifert testkits so no doubt with this kit.

What is ur suggestion ?

[lightningstrike]

my suggestion will be to follow advance aquarist tips

here it is in my own words,

1. Grow macroalgae for nutrient export.

2. Get a more efficient skimmer.

3. Drip kalk

4. use phosphate removing agents, e.g. rowa

5. keep pH high (8.4)

Pls refer to this link (Advance Aquarist) for detailed info.

p.s. i hv tried tips 1 to 4 b4, but not tip 5.

[minsmarine]

Tried 1, 2, 4.

My refug, macroalgae is growing.

My Skimmer is giving me mud till every 2 days need to clean whole collection chamber.

Using Tunze PO4 remover ( was told better than Rowa ), or anyway to maximize remover. Like passing totally.

No.3 will try and see.

No.4 My PH is around 8.3 stable