Whats this on the dec in the tank?

[StuMcc99]

Can anyone help? This is my sisters tank. She has put a live plant in her tank and now all her dec's in the tank have got a brown thing on top of them.

 

[Mrc8858]

Just algae, keep up with the water changes and cleaning the decor periodically and you'll be fine lol.

 

[Convict2161]

Just algae, keep up with the water changes and cleaning the decor periodically and you'll be fine lol.

+1 looks like diatoms it's perfectly normal. As Matt said. Water changes and cleaning of your decor will aid in it dissipating(spelled right?)

 

[StuMcc99]

Ok cool thanks I will let her know,

Also could you help ID this fish for me?
Again it's another one of my sisters tank and was given it off a friend.

 

[Mrc8858]

Looks to be a very pregnant platy.

 

[StuMcc99]

Can platy's be cold water fish as well? She got given them with the other tank & they were in cold water.

 

[Majbarsalona]

Can platy's be cold water fish as well? She got given them with the other tank & they were in cold water.

No they are tropical fish and require a heater

 

[StuMcc99]

She has put a heater in it and turning the heat up slowly, she was told that she can do this in her LFS, that's why I was wondering if they was platy's as who ever had them 1st had them in cold water.