good

I have a 125g aquarium, with a fluval fx4. It has a carbon filter, some filter floss(mostly for catching the diatoms), and seachem matrix media. I have a Coralife 125g protein skimmer that still has microbubbles for about a month now and it is pretty loud, but does produce skimmate. I have some...

Sorry about the quality but taken with my phone at night with a flashlight

What is this?

Hi guys, The sand in my tank is starting to get a little PINK ?? Is it a bad thing? I tried to take a picture... it doesn't appear to be so pink but it's pinker than on the picture! here it is! Hope to hear from you soon! thanks in advance!

Is this little guy good or bad? Just found him on a rock in the tank and I think saw something that looking like this one saying take it out.