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Earlier this week I did a water change on my small 15g column tank. Since it's in the office and there's not a lot of places to keep freshwater and mix saltwater, I just buy Saltwater from the LFS. In doing so, they accidentally gave me fresh water, and without checking (because I know they...

I bought some acro yesterday - does anyone know what it is specifically? Additionally, on the same rock came a little fuzzy piece. Can anyone identify that as well?

My ex and I (whom I was living with) broke up, so my 50 gallon tank stayed there :( So at my office, I had a 15 gallon column for a freshwater setup. I gave away the fish and plants and started up a new saltwater tank in early December. It finished its cycle last week. So now I have corals and...

My girlfriend noticed something in our tank last night. Maybe someone can explain this. We got a ricordea thanksgiving week, and there's a little separated piece that just showed up randomly. My question is just a general "how did this happen". Do ricordeas break off/separate and start...

I bought an Odyssea T5HO light fixture a while back. Honestly it's doing great and growth has been pretty okay. However I'd like to upgrade the bulbs but I'm just not sure what to do. Right now I have 2 10k and 2 antics. I'm looking at ATI bulbs and thought about this: Blue+ Blue+...

I've had Blue Clove Polyps since I got my lights. It was one of my first corals. It was doing fine, but in the past couple weeks it's been a little shy looking in the sense that it only opens up about half way. It sits about halfway in the tank under 4x T5s. There's pretty moderate flow in that...

I had a yellow tang for a month that suddenly died. I thought maybe I cooked it since the temp was a little high (84). There were no signs of stress though, and was eating fine. After he died we replaced it with another. We've had him since July and again was perfectly happy. Ate fine and had...

So I've been noticing this white fuzzy stuff growing in two different locations. They both look like cotton. One is thicker than the other, but the lighter one is thickening up. What is this stuff? I can't seem to find much about it.

What's the best process for upgrading tanks if you want to keep all of the livestock/sand/rock/corals? I'd be going from a 50 gallon to 120 gallon. My original thoughts were 1. Get new tank/equipment 2. Add the additional rock/sand/water to new tank. Also I'd put in some of my current LR. 3...

Sorry for the cruddy image, but I saw this guy at the LFS and thought my girlfriend would love it :) It's just now starting to come out, but here it is. Any idea what exactly it is?

I bought a test kit for calcium/carb hardnes/nitrate/phosphate. I got a reading of about 600 for calcium, and the only instructions it gave was how to increase it if it's too low.. I've not been dosing for this or anything.. So, is this too high? should I reduce it? If so, how?

I assume this is diatoms? It's appearing in the back two corners where there's probably the least flow. I have a clean up crew of about 60+ dwarf ceriths, a handful of nerite/florida ceriths/nassarius (about 6ish of each) all in a 50 gallon. Will these guys eventually take care of it?

So, we "adopted" a 50 gallon tank that was left in the house. When we got it, it was filthy but had been running for years, the only residents when we got it were live rock, aiptasia and some random life in the LR. Here's how it was when we first got it: after some "cleanup", we brought it...

I've studied a lot of designs, and I've got a good understanding of what I need to do. However, I do have a few questions. 1. I don't have holes, nor want to drill them. What's the piece called that I can get for over the top drain? 2. On a budget, and am looking for a skimmer. At the...

I was buying a few blue leg hermit crabs, and asked for a few extra shells. In one of the shells apparently was what appears to be a blue brittle starfish. It's tiny. Maybe an inch long total. Should I do anything to keep it surviving in my tank? I only have a few hermits, turbos, a full sized...

We've adopted a FOWLR tank and keep seeing this algae. What is this? Is it okay? Is it bad?

How safe is it to replace sand completely? I inherited a tank that originally looked really bad, but is now getting better. But the OCD in me is wanting much cleaner looking sand. It started this bad: and is now at this point: I'm fearing it'll be more than a couple of months to get...

Hopefully I'll get a good pic today to post, but was curious of your thoughts. My girlfriend and I inherited a saltwater aquarium. Basically her parents, who had one had one running but hadn't kept up with it in about a year. There was live rock and a serpentine star living in there. The...

My girlfriend and I live in her parents old house and they left the saltwater tank there. For the past year or so the only thing in there was the water, live rock and a serpentine starfish. Its grown algae probably way too often, but after the starfish died we've been trying to take care of it...