My Female Clown's mouth is always open

[MassLambresa]

Hi, I am relatively new to the marine hobby and have had my tank for over 5 months now. I have a selection of livestock in my tank which is a Fluval Edge M60 91 litre tank. I have a breeding pair of Clown's of which I have had for about 4 months and they have always been pretty happy/lively. Recently though the female's mouth has stayed open and she has not eaten as much as she used to but still eats a fair bit and seems healthy apart from this. All the other livestock seem healthy apart from my Starfish which is randomly dropping limbs off but still alive and moving about freely although that is another topic.

Can anyone help with any advice as to what this might be and ways to help her? any advice would be appreciated.

At present my parameters are as below:

Salinity - 1.022
Ammonia - 0
Nitrite - 0
Nitrate - 80 (I have fitted a filter to reduce this and doing water changes as it was higher)
Phosphate - 0.05

I have attached a few images below

 

[mayjong]

not sure on the fish, but i'm surprised your corals are ok with that salinity, it is pretty low...

 

[ClownNut]

clean your pump, once algae grow on them it can reduce the flow as much as 50%。
your PO4 level also higher than what your test kit telling you. because the red slime using them as well.
try to get your NO3 lower, 25ppm or lower will be nice. try to replace decoration with LR will help your NO3 lvl.
ooh, whoever sell you that flower pot coral. dont go back to that place anymore. it's very unethical to sell that coral to someone that's just new to saltwater.

 

[MassLambresa]

not sure on the fish, but i'm surprised your corals are ok with that salinity, it is pretty low...

Thanks for your reply. What salinity would you advise for the corals as I'll look to increase it if that will aid them

 

[MassLambresa]

clean your pump, once algae grow on them it can reduce the flow as much as 50%。
your PO4 level also higher than what your test kit telling you. because the red slime using them as well.
try to get your NO3 lower, 25ppm or lower will be nice. try to replace decoration with LR will help your NO3 lvl.
ooh, whoever sell you that flower pot coral. dont go back to that place anymore. it's very unethical to sell that coral to someone that's just new to saltwater.

Thanks for your reply, I was actually planning on removing the decorations and replacing with live rock anyway so will probably bring that forward and do it over the weekend :rollface:

 

[mayjong]

1.025 on the salinity ( anywhere from 1024 to 1026 is fine)
Raise it slowly, a good way is to use regular strength saltwater (1.025) for your top off water for a while. It will probably take a few days that way. Test regularly while doing it you don't want to overshoot that level! Then go back to rodi water for topoff after you get there

 

[MassLambresa]

1.025 on the salinity ( anywhere from 1024 to 1026 is fine)
Raise it slowly, a good way is to use regular strength saltwater (1.025) for your top off water for a while. It will probably take a few days that way. Test regularly while doing it you don't want to overshoot that level! Then go back to rodi water for topoff after you get there

Thanks for the advice, much appreciated as always