sucker fish

I introduced fishes to my planted aquarium yesterday. I waited one week after planting some carpet and other plants to introduce fishes into it. I bought 4 neon tetras, 2 gourami, 2 flat white tetras, 2 orange tetra, 4 moulii and two algae eaters. These algae eaters were 3 and 4 cm in length...

Hi there, I'm a newbie to the forum, and was wondering if anyone can help me out on this issue. I have had 3 fish in total now over the course of a couple of months, brutally attacked and killed. 2 of my sucker fish had their heads clean ripped off (none of the fish was eaten), and this morning...

One of my Ottos has recently developed a huge white spot on his back, and I don't know what it is! I couldn't find anything from online research either, so I'm scared it's undiagnosable?? I've attached a picture to this post. Could it be some kind of external parasite or an infection?