I have a 20 gallon fishtank with three goldfish and one plecostamus. Everything's been great for over a year until yesterday. There was some water evaporation so I decided to add some plain tap water, a couple of gallons, maybe. I've done this before with no ill consequences. Then I discovered that I had some Aqua Plus left, and poured in about 1/2 cup. It's always worked fine both in this tank and in my pond outside. However, this morning (the "morning after") my tank is completely cloudy! The fish look okay but I just don't understand what's going on. The tap water was completely clear, and Aqua Plus is used to clear up cloudy tanks! What could be going on here?? the fish are still looking good but the cloudy tank looks horrible.
posted by DMelanogaster on Nov 17, 2009 - 9 answers

What are the thermodynamics of frozen sushi-grade tuna? [more inside]
posted by underwater on Sep 21, 2009 - 7 answers

What would be a delicious fish dish for my wedding? What are your favorite fish recipes, flavors or dishes? [more inside]
posted by rglass on Sep 21, 2009 - 23 answers

[AquariumFilter] I have a Magnum H.O.T. filter on a 29g freshwater tank and I am considering changing to a Penguin Emperor 400. Is this a wise move? Do I have to run them in parallel? (and another weird question about inhabitants) [more inside]
posted by Drasher on Sep 13, 2009 - 11 answers

What are the best beaches for snorkeling in Puerto Rico and Vieques? I visited this amazing beach in PR two years ago and am looking for something similar... [more inside]
posted by exhilaration on Aug 31, 2009 - 11 answers

What is this spiky fish carcass? [more inside]
posted by jalexc on Aug 31, 2009 - 8 answers

I was swimming at Naples Beach Florida this morning and a very persistent, long thin fish kept nibbling at my legs. It was 2-3 inches long, maybe 1/4 inch thick, & had bold black & white stripes. It seemed to want to attach to me in the same way shark lamprey do. What was it?
posted by media_itoku on Aug 7, 2009 - 3 answers

It's green, it grows, it tastes like fish. What is it and what can I do with it? [more inside]
posted by maudlin on Jun 7, 2009 - 5 answers

What size tank and type of fish are best for a beginner with a ~20 tank size limit? I'd like something that isn't too time-consuming. [more inside]
posted by biochemist on May 31, 2009 - 12 answers

How do I safely clean a very stinky glass dish with plastic Tupperware-style lid that sat out on the counter for days after holding smoked mackerel? [more inside]
posted by cadge on May 26, 2009 - 11 answers

Are Trader Joe's Salmon Oil capsules still good for you even though they are so much cheaper then health food store brands? [more inside]
posted by bobbyno on May 25, 2009 - 12 answers

Where can I buy a fake (non-edible) salmon fillet? [more inside]
posted by kepano on May 24, 2009 - 8 answers

Trying to remember a cool site about ethical seafood and fish? [more inside]
posted by furtive on May 8, 2009 - 4 answers

What is this short story about a diver falling from the sky? [more inside]
posted by nvly on Apr 6, 2009 - 5 answers

Can anyone identify what kind of fish this is? [more inside]
posted by minicloud on Apr 6, 2009 - 9 answers

Can anyone recommend a good place to buy fish in lower Manhattan or North Brooklyn? [more inside]
posted by toomuchkatherine on Mar 31, 2009 - 7 answers

RecipeFilter: Seafood stew stumper! [more inside]
posted by owtytrof on Mar 19, 2009 - 11 answers

What are some cooking and diet tips for an ovo-lacto carnivore? (No, that wasn't a typo.) [more inside]
posted by korpios on Mar 10, 2009 - 19 answers

How do I get my shells to stop smelling like fish? [more inside]
posted by dame on Mar 1, 2009 - 4 answers

A few weeks ago, I ate a strange sushi made with a large black roe. Does anyone know what it is? [more inside]
posted by qvtqht on Feb 9, 2009 - 14 answers

Where should I get my underwater camera film developed in San Francisco (or by mail, if there's a good option)? [more inside]
posted by roxie110 on Jan 27, 2009 - 11 answers

After a decade of vegetarianism, I'd like start including fish in my diet. I live near my city's major fish market, but I have no idea what to buy or how to cook it. I would love to hear your favourite simple fish recipes. [more inside]
posted by [ixia] on Jan 16, 2009 - 38 answers

What is the tastiest seafood with the most omegas and the least mercury? [more inside]
posted by mateuslee on Jan 14, 2009 - 16 answers

What kind of pet should I get? [more inside]
posted by Tu13es on Jan 12, 2009 - 25 answers

I've finally equipped and decorated my new 55 gallon aquarium - and yet, I still don't know what kind of freshwater fish to populate it with. [more inside]
posted by Bakuun on Jan 10, 2009 - 22 answers

What fishy organ did I eat? [more inside]
posted by Rora on Jan 4, 2009 - 4 answers

Can I make a ceviche a day ahead? [more inside]
posted by deinemutti on Jan 2, 2009 - 4 answers

Do kids still collect and sell earthworms for fish bait? [more inside]
posted by Tube on Dec 27, 2008 - 12 answers

This is a question about cleaning fish! I bought some fish today! But I don't want to cook them now, I want to eat em on Christmas Day. [more inside]
posted by mooza on Dec 23, 2008 - 7 answers

What is the best fish cookbook for the beginner?
posted by parmanparman on Nov 23, 2008 - 11 answers

I'm visiting Portland this weekend and would love some food tourism suggestions. [more inside]
posted by TungstenChef on Nov 19, 2008 - 18 answers

Can someone explain the processes of how fish gets from fishermen and producers in California (specifically the San Francisco bay area) to restaurants. Is there a central fish/wholesale market? [more inside]
posted by Infernarl on Oct 25, 2008 - 3 answers

Please help me identify some fishes my teacher caught in the Gulf of Maine. [more inside]
posted by nosniW on Oct 14, 2008 - 7 answers

I was in Costa Rica a few years ago, and ate fish that appeared to be cooked but wasn't -- it was in some kind of juice that "cooks" the fish. What is this method of cooking called and how is it done? Also, I drank something that night that after a few hours made me feel a little nauseous and was accompanied by hallucinations (like rocks splitting open revealing water and snakes inside). Any idea what I could have drank? And where can I get more of it?
posted by indigo4963 on Sep 19, 2008 - 14 answers

Should vegetarians eat fish? How about shrimp? Mollusks? [more inside]
posted by jpg15 on Sep 15, 2008 - 48 answers

Aw crap, I left some salmon out overnight. Is it still safe to eat? [more inside]
posted by nímwunnan on Sep 12, 2008 - 34 answers

I recently read about a fish where the male subsumes itself into the female and becomes merely a pair of testes that feed the ovaries or something. Does anyone know anything about this weird fish?
posted by symbioid on Sep 10, 2008 - 5 answers

Ever notice the fish tanks with koi carp near the entrance in many Chinese restaurants? A friend told me that they are actually there to indicate (perhaps through the number or type of fish?) whether the restaurant owner has paid up to the local Chinese mafia (triad). Is there any truth to this or is it just another urban legend?
posted by sour cream on Aug 25, 2008 - 21 answers

Fathers-Day-Fishing-Outing: Success. Yay! ...but I'm more accustomed to tiny, easily-packable, easily-fryable bluegills, and with the relative freezer space, too. I've got a whole king salmon saved (off-site) for smoking next month, but what do I do with the other eleven pounds? [more inside]
posted by mimi on Jul 20, 2008 - 5 answers

What vegetables, fruits, fish and animals would be recommended for a self-sufficient survival farm? [more inside]
posted by netbros on Jul 7, 2008 - 26 answers

Where is there an actual fish market in San Diego? [more inside]
posted by brynna on Jul 6, 2008 - 7 answers

What, if anything, is this picture from the comic book Castle Waiting based on? [more inside]
posted by shirobara on Jun 30, 2008 - 6 answers

Please help me identify this fish that I found in NYC along the Hudson River. [more inside]
posted by funkiwan on Jun 2, 2008 - 5 answers

Does goon (box wine) actually contain fish eggs? [more inside]
posted by Black_Umbrella on May 16, 2008 - 6 answers

Can I raise fish for eating in my back yard? [more inside]
posted by serazin on May 9, 2008 - 8 answers

Given the recent reports about seafood from China that is both bacterio- or viral-contaminated and chemically contaminated, does anyone have info about exactly which fish/shellfish to stay completely away from, especially in restaurants?
posted by yazi on May 6, 2008 - 5 answers

I want to set up a 3gal nano reef tank (possible slightly larger, up to 10gal). I want the system to be as aesthetically pleasing as possible, namely by keeping any equipment out of sight. Could I just drill two holes in the tank, and use a powerful external canister filter, to filter the water and provide water movement? Or is a seperate powerhead necessary? In addition, is there an external way of heating the water, without the use of a sump? Thanks a lot.
posted by BritishGas on Apr 20, 2008 - 5 answers

I just rescued a couple of fancy goldfish, and I could use some advice on how to properly care for them. Is it normal for them to rest on the bottom of the tank? How much should I feed them? [more inside]
posted by team lowkey on Apr 18, 2008 - 11 answers

Please help me identify a fish that washed up on a Pacific Ocean beach in Oregon. [more inside]
posted by efalk on Apr 17, 2008 - 7 answers

Does anybody have a lead on shad roe by mail? [more inside]
posted by veggieboy on Apr 15, 2008 - 3 answers