algae bloom..Nitrate < 10 phosphate = 0

[wa_lanz]

arghh.. sand bed and LR plagued by the same type of algae as those in GiantBicycle's tank... grows super fast and releasing lotsa air bubbles.. high flow or not doesnt help.. its EVERYWHERE!!!

http://www.sgreefclub.com/forum/index.php?showtopic=24551

don have any fishes at all.. just corals... using beckett skimmer with 3x PUR-II carbon and 500ml Aquaphos.

Nitrate < 10

Phosphate = 0

all other parameters in check..

been doing water changes as i wanna get my nitrates down to 0 but after water changes more algae would bloom...

Using overnight tap water + dechlorinator with Marine Environment salt.

change water = more algae..

don change cant get nitrate to 0..

reducing photoperiod doesnt help as stated by GB..

thinking of changing water with NSW...

or just wait patiently for it to disappear by itself..

wat should i do????.... suggestions please..

[firestream]

I guess it is silicate that cause the problem .. which was added by the tap water .

get some Seachem SeaGel to remove the silicate ...

[minsmarine]

as I understand PO4 is the clupit of Algae.

Just to remind you whether your PO4 test kits is reliable ?

[weileong]

Few things could be happening.

PUR-II carbon leaching PO4.

Tap water contains PO4. The more water you change the more PO4 you introduce. Use this method only if you use RO/DI water with 0ppm TDS reading.

Aquaphos exhausted or used in not so efficient way. If used in mesh bag then try to knead it daily.

What PO4 testkit are you using? Most hobby testkit has poor lowest detection limit so it shows your PO4 is undetectable you still have some PO4 reading just that either your eyes cannot see the color or the testkit in not capable of testing it.

Best solution, use the aquaphos in a FR, use DO/RI water and use a reliable brand of GAC that don't leach PO4.

Manually ###### of the cyano will help too.

Tune your beckett for wetter skimmer if not clean the collection cup/neck daily.

[wa_lanz]

using saliferts test kit..aquaphos still quite new..

hmm could silicate contribute to algae growth??

PUR-II and Seachem matrix carbon.. which is better in terms of least PO4 leeched??

thanks for all the advise..

[weileong]

Skip the carbon at this stage. Get an FR for the PO4 media.

[wa_lanz]

already have carbon running for some time liaoz.. remove it for the time being??

and regarding FR.. a normal resun will do the job just fine right??

[weileong]

resun FR will work fine... prices are very low.. no reasons not to use it.

[wa_lanz]

weileong..

[Ekia]

Another way is to use DI water... quite affordable nowadays...

http://arofanatics.com/forums/showthread.php?t=166483

[firestream]

silicate is relate to diatom problem ... do read up ..

if you change a lot of water from tap water .. it will add up the silicate too

[weileong]

rowaphos absorbs silicates too