overnight colour loss in some corals.

[BlueTang<3]

I am going to guess that the drop in nitrate and phosphate was too rapid and it is stressing the corals out. Is it pale and they are brown or going pale ?

[rickwaines]

Originally Posted by BlueTang<3

I am going to guess that the drop in nitrate and phosphate was too rapid and it is stressing the corals out. Is it pale and they are brown or going pale ?

thank you for your response. no brown just a loss of colour, pale by comparison to that last few months. not dead it doesn't seem just a fairly substatial loss of vibrancy.

[MitchM]

You may have some alleopathy going on, are you running any carbon?
40g is small to be keeping both SPS and LPS. They have pretty different flow requirements.

Corals would notice both the change to RO (depending on what you changed from) and that you're using more than usual phosphate remover.
I would be surprised if you didn't notice any changes after that.

[rickwaines]

Thanks Mitch.

Things seem to be back on track. colours coming back with most. And yes I am running carbon.

[Proteus]

I'd have to agree with Wes. Just a big in po4 and possibly alk

Glad it's comming back

[dudley moray]

What your ph?