fantail fish

[fantail]

I Have had 2 fantail fish for approx 3 months, i always clean the tank and do a water chage every 4 weeks but only recentley i have noticed that the plastic plants in the tank have started to discolour to brown, does anyone know what may be causing this??

[B00]

It's algae and fish poo, all you need to do is wash the plants in the water you've taken from the tank, they'll clean back up again.

[dave1969]

You can buy a products that can kill algae for fish tanks i think it might be algazine or somthing like that which is safe for fish but kills algae and last for ages