decentkid

hmmm....bro...thanks for that...kind of cleared my doubts.... also i didnt think bacteria using oxygen from sulfate compunds...thats a very good point... btw...i think its the way i type...i was tyring to say that critters can prevent the build up of hydrogen sulphide

hey bro...happy birthday

hope this helps...

madmac...no offense here...but i dont really get u... any i really hope u or blueheaven can answer my question about why black patches are regions of H2S when H2S is colourless...so where does these black patches come from?

bro...those critters do have a food web of their own lar....fishes and other things will consume them.... and yes i agree that a DSB will give one worries...adding to algae problems...but DSB do have their use if maintianed properly and to add....H2S will kill both denitrificating and nitrificating bacteria....but there is also another aerobic bacteria that will reduce the H2S sulphate....its a whole cycle in the tank...but the tricky apart is to prevent the build up of H2S...and that is when u really have to maintain the sand bed....

yes...the both of you are correct, H2S are formed from decomposition...if the SB detritivours are of appropriate amounts, the amount of H2S produced is reduced...but however, if a pool of H2S does get accumulated, then that area can be a death zone, thats why the need for critters to prevent that from happening on the other hand, H2S will dissociate in the water to become a weak acid and will react with oxygen to form sulphuric acid, but marine environment is usually an alkaline one...and also a weak alkali...so the reaction rate is slow...if less oxygen does reach these regions, the weak acid cannot become sulphuric acid and cannot react completely so the tendency to accumulate till horrible levels now what i am trying to find out is...how to conclude that the black regions are hydrogen suphide when hydrogen suphide is colourless??

that was a nice angel

bro...just my 2 cents, but DSB can become a time bomb due to a build up of organic materials and H2S over time....best if u can maintain the number of critters in the sand bed with will continously shift the sand bed, will allow the bacteria to work better and also release small amounts of H2S over time madmac: i have to agree with what u said, however, i also wish to know why is the black patch H2S when H2S is colourless???

previously i asked this in RC, and Dr Ron (if i never remember wrongly) replied that this is a kind of cyano, not hydrogen sulphide, reason: cos hydrogen sulphide is colourless anyone has any idea?

dont mind helping out ...but there will be a change in my school time table, so cant confirm when i can make it until the new time table is out next week, will update then

really awesome!! http://mail.lynms.edu.hk/~cwk/sand.wmv

i stay bukit timah area also didnt feel anything

jus click on the links Original: http://www.newgrounds.com/portal/view/206373 Japanese one: http://ikari0310.hp.infoseek.co.jp/flash/maiyahi.html Interpreted one: http://www.mainstreamist.com/dragostea.htm Malaysian one: http://home.graffiti.net/hangrump/numanuma.wmv

one tip...try to mention those place of those photos which he "pasted" up

yea...i am also curious if this is possible can someone enlighten me and bro surfedelic?

i see 9 faces but 5 horses only

i no time to take photos of war...but heres goes what happened in my tank hammer vs prata- hammer lose millipore vs digitata- digitata lose staghorn vs moon- staghorn lose open brain vs elegence- nothing happen hammer vs zoos- nothing happen prata vs yuma- yuma lose

bro...interested

mine also same shipment...no problem..only it doesnt open as big as ekia's one...think too little current...cos my elegence tentacles not moving at all..and my nitrate is 0...nv feed before but still healthy

bro...IMO...its better to throw away the zoos...once a coral can even be covered by cyano...it already shows how weak the coral is...

WOW!!! this is the nicest pair of clowns i have ever seen!!!

yea...it doesnt look like a moon...any pros can help?

bro..interested in the red mushy

huh?? when i say they lost way?? they can lost way one meh???