Koi Fish Information Centre

First thing as you likely already know, you need to find out what kind of unidentified fish you have. Go back to the store where you bought them and look for them in the tanks and find out what they are.
Second, it’s a good idea to test your water on a regular basis when you first get started in the hobby until you “learn” the basics and what is needed to keep your tank in good condition. You can get a decent master test kit for under $20.00 which should have at least the tests for ammonia, nitrite, nitrate and pH. If you can get one with GH and KH also, that would be even better. Give us your test results in numbers as soon as possible. If you can’t get a master test kit right now, ask your fish store if they can test your water (usually for free) and write down the numbers for us… not just “He said it was OK” as we don’t know if “he” knows what he’s talking about. LOL
From what you have posted, you have some potential issues and/or problems.
I’m guessing the Glow Red Zebra’s are Red Glofish Zebra Danios which are just regular zebra danio’s which have been genetically engineered to have the day-glo color pigmentation. I think they come in red, green and orange.. More info can be found about them at http://www.glofish.com/ They need to be cared for just like regular Zebra Danios. They should be in schools of at least six, so you need to work on getting four more as soon as possible, with at least two females for each male to minimize aggression during mating periods. Here’s a good profile on them with more care information. http://fish.mongabay.com/species/Brachydanio_aequipinnatus.html
The Sunset Gourami’s are the dwarf varieties so they should be OK. Regular gouramis would get too big for a 20G. http://fish.mongabay.com/species/Colisa_lalia.html
The platy should be fine. http://fish.mongabay.com/species/Xiphophorus_maculatus.html
You need to find out what kind of catfish you have. They can range from species like otocinclus which can stay under 2″ as adults up to a freshwater river catfish which can grow to the size of a large adult human. There are literally thousands of catfish species so it’s important that you find out exactly what you have.
Same with the “pink guy” and the “silvery pinkish fish”.
Same with the algae eaters. There are hundreds of different kinds of algae eaters. Some stay small like the otocinclus (2″ or so) and others grow huge like a common pleco (over 18″)
Without knowing what these unknown fish are, you could be OK or you could be destined for major problems with the ecosystem in your tank.
As far as the missing fish, if a fish dies, it can be consumed rather quickly by it’s tank mates. Some of your fish could be carnivorous or omnivorous so they might happen to like a little sushi in their diet.
Lenny Vasbinder Fish Blog - http://GoldLenny.blogspot.com

Category: Philippines Internet Koi Society