Yellowish waters

[ady]

Yo Bros...

I've got a problem with my water colour. It is yellowish in colour.

Trie to do half tank water change, used activated charcoal etc...

still yellow colour. Some ppl said that it could be the lightings as I'm

using Daylight florecent bulb and some even said that it couldbe the

glass itself...

Tried to change the bulb and transfered the existing water to a spare tank.

Still yellowish colour in the spare tank. FYI, I am using fake plants, corals.

Also using lava rocks in my 4feet tank. The water has been yellowish way

before I bought the rocks.

Water conditions are very good. Stable. No fish have died for the past 8months.

Salt salinity ranging 1.021 to 1.024. Water temp: 31degree Celcius to max 32 degree Celcius

Please advise.

Thanks

[hammy]

do u use drift wood for fresh water .

normally they release tannic acid which cause the yellowing of the tank.

using good activated carbon like rowacarbon should solve the problem.

if ur lighting bulb is around 6500k - 10000k , it will be yellow no matter u change new ones or using old ones. combine it with actinic blue should balance the lighting and increase viewing pleasure.

[ady]

Yo Bro hammy...

I did not use any driftwood for my tank

Lighting wise I use OSIM 30watt floresent light.

I have used a good carcoal, but still yellow colour...

Please advise...

Thanks bro Hammy

[andylee]

think the problem lies with the FL u using. try using t5.

[davwong]

How about posting a picture of your tank might help.

[255 255 255 0]

i'm piggybacking this thread

having the same problem recently. my guess is lighting

[iantoh]

hi there ady,

in marine systems, the yellowing of water within the system isnt from tannin that is leached from driftwood, but a chemical called gelvin, that is derived from breakdown of organic particles. the general recommendation is to run activated carbon on the system and try water changes to alleviate the problem. it seems like youve done both so am not sure why it hasnt worked.

did you use the carbon in an FR or in a filter bag? if you used carbon in a filter bag, you will need to place this bag in an area where water is forced to go through the filter bag to be of use. if a filter bag is just placed in the sump, water can easily flow past and around the carbon media, and will thus not be filtered by the carbon, so maybe thats a point to take note. if the problem still persists, then maybe you can try running ozone. with ozone, im sure your water will be clearer, though using more carbon should be a first step before ozone as its unnecessary expense in my opinion.

just a thought, do you have any yellow coloured corals in your system? sometimes, anemones and gonioporas, etc, are dyed to raise their selling appeal, and if yellow dye is used, this could be leeched out thereafter, which would cause yellowing of the water.

anyhows, just thinking aloud my thoughts and hope something there helps you ya.

cheers,

ian

[Achilles Tang]

Can you do a test?

Fill a clear thin glass full of tank water and place it on white paper, have very white light around (sunlight is best)... put a strip of white plastic halfway into the water and see if it appears yellow underwater.

It could be your lighting as daylight tubes are made to duplicate 6500k... so its definitely yellow.

[ady]

Hi Bros...

sorry no reply from me... Been very buzy nowadays...

I guessed you guys are right. I Think it has been the lightings issue.

Did the water test, water seemed to be ok. Clear.

Anyway, thanks alot for the guys contributing the suggestions/answers to my problem here. Thanks...

Anyway, this is my tank, looks clear in pic but yellow in rel life....

God... I need to change my lightings soon....