Cyano in the day, Clean in the night.

[prec]

im doing close to BB in my tank with abt 1cm sand left in my tank.. it keeps having cyano in the day and its gone at night.. running rowa liao but no use. feeding every 2 days. dosing phyto once a week. trying to get my bottom with higher current.. any ideas??

NO3: 5ppm

Currently having some ideas on how to keep the sandbed clean and free from cyano:

1. using 1 x 820 and 1 x 1100 now.. tot of changing to 1 x 1100 and 1 x 6060. (improved water circulation rate)

2. get a group of sandshifters (disadv: will start digging dunes in my SB)

3. Remove every coral from my sandbed and place them on rocks

Please comment and help..

[Eric]

im doing close to BB in my tank with abt 1cm sand left in my tank.. it keeps having cyano in the day and its gone at night.. running rowa liao but no use. feeding every 2 days. dosing phyto once a week. trying to get my bottom with higher current.. any ideas??

NO3: 5ppm

Currently having some ideas on how to keep the sandbed clean and free from cyano:

1. using 1 x 820 and 1 x 1100 now.. tot of changing to 1 x 1100 and 1 x 6060. (improved water circulation rate)

2. get a group of sandshifters (disadv: will start digging dunes in my SB)

3. Remove every coral from my sandbed and place them on rocks

Please comment and help..

I think you are on the right track...........maybe just do a water change weekly on top of what you have already done. Your cyano problem should vanish in a month's time.

Eric

[FuEl]

Sounds like dinoflagellates..

[prec]

Sounds like dinoflagellates..

what's that bro?? care to elaborate??

[FuEl]

http://www.petsforum.com/personal/trevor-j...hikeralgae.html

http://www.reefs.org/library/aquarium_net/996/996_2.html

If the cyano looks more brown than red it is most probably dinoflagellates. Encountered them before when I had my tank last time, I notice they would become less visible at night too. Normally they form a film and will have air bubbles trapped below them.

In any case, reducing nutrient levels will help control their spread.

[ozy]

From what I read from the books, if it is cyano, the recommendation is to increase skimming.

[prec]

http://www.petsforum.com/personal/trevor-j...hikeralgae.html

http://www.reefs.org/library/aquarium_net/996/996_2.html

If the cyano looks more brown than red it is most probably dinoflagellates. Encountered them before when I had my tank last time, I notice they would become less visible at night too. Normally they form a film and will have air bubbles trapped below them.

In any case, reducing nutrient levels will help control their spread.

hmm imo, they are definitely red.. not a bit of brown but they are not those like to form a patch of thick sticky red blobs with bubbles but rather like those finely woven thin stretch of silky red thread "mats"

[prec]

anyone?

[Kelmen]

I still has cyano problem, but now is problematic in refugium. Main tank seems "settled".

What I did in the main tank:

- get something to cover them (I use cheap car mat - rubber), because they need light. No light, they will dwindle. Then 2 things happened (not by me); 1 area visited by my sea cuke, think it eat those dwindled cyano. the other area, seems slowly revive (now still quite small area, near anemone, very hard to tackle now)

- I also got some on my powerhead, I try place a snail (turbo), seems like it eat them, or dislodge them.

They do grow back, try again few times with few other snails, sometime work, sometime still there

- I also reduce feeding from daily to every 2 days. Dunno this really help or not.

HTH

[hotlemond]

i think you are doing fine. I had cyano in the past too.

What i did was increase flow in the tank, reduce photo period, reduce feeding, maintain skimmer in peak performance and no water change. It went away after 2 weeks.

As I dun have a tap water filter then, so dare not change water for fear of introducing more nitrate/phosphate into the system.

Ozy had a point there. Wash and maintain your skimmer more often to let it pull out the DOC more efficiently