corals close up after MH on.

[ReDDeviLs]

hey guys,i have a 3x1.5x1.5tank running with 2x39w T5 1 white 1 blue.

1hour ago i added a 1x150W mh and 1 hour later i found out that all my corals hard or soft.. those high up or way below starts to close up!!

can someone help me!?

temp is not a problem as im running a chiller temp at 27-29degrees!

[mhermie]

bro,

just give the corals some time to adjust to the new lighting. just fyi, some corals dont need high lighting.

[aquabeAnz]

i think, i SAID i think the best way would be to:

if u do nt wish to change the height of your MH,

descend your corals down to allow them to get used to the new intensity.

gradually move them up as you see them opening even MH is on.

if u do nt wish to move ur corals,

then i guess u have to start with a higher height of ur MH to e water surface.

start with a height that the softies and hardies are comfortable with, then gradually to the optimum height ...

my bulb leaves the water surface at rnd 10 inches... mines a 250 anyway

have fun~!~!

[ReDDeviLs]

mine is about 1ft away from water surface, no way to move corals down as those on the bottom also close up haha, i'll move the lights up and see how

[Terryz_]

Give them some time to adjust to the new light intensity... Just be careful that no corals are bleaching becos of it...

[shoelevy]

yeah...its called light shock....imagine yr house lit up by normal fl suddenly i install flood lights...sure u close yr eyes ma

[Clownfish]

acclimitise ur lights properly... hang realli high... maybe u can start from ard 12 to 16 inches then slowly descend downwards as days goes down, like 3 days a inch like that...

try arrange ur corals as well, those requiring lower lights place them lower... u wont like it when u see ur mushrooms melt away

[Cedric]

Is it a DE or SE bulb? Got glass for UV shielding?

Take care!

[ReDDeviLs]

i got the lights from victron,

initally i was on 2x39W T5: Corals opening as usual.

Saturday night i added 1x150w MH: Corals starts closing up.

Sunday was on 2x39W T5 only: corals still not opening.

today on 2x39W T5 again.. :corals like hammers and buttons did not open fully, star polyns open up

some mushrooms open up some facing the T5 closed.

so what should i do? continue to hang the mh as high as possible?

hammers are about 4inch beneath water and my mh is now about 12inch above water level.

please help~

[ReDDeviLs]

to add on:

lights were use on old tanks and some corals were doing well under it, lost some hammers during that time,not sure is temp or the light itself as im not on chiller that time.

it has some words on the glass shield in german i think no idea what its saying too.