Sponge turning brown, should I worry?

[Pisquini]

Hello, I had posted a picture a little bit back about something growing in my tank, all said it was a sponge and not to worry about it. It used to be white. Now it has gotten bigger and has turned brown. Should I be worried?

Thanx in advance for any help!

 

[mcarroll]

Very cool pics - it's great to see updates!

You didn't spend any worry getting him to grow, plus little is known about sponges and what it really takes to make any given one happy, so i wouldn't spend any time worrying over this one regardless. :) Just keep doing what you are doing with the tank!

My experience says that if they are hearty enough to settle and grow out in your tank, they aren't going to need special attention. Your looks as well as any right now. :)

Can't wait to see more pics!

-Matt