Tropical Fish Keeping - Aquarium fish care and resources

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rgs1975 07-15-2009 02:59 PM

Looking for a new resident in the home tank
I'm going to be upgrading my home tank from a 25 gallon to a 37 gallon in the next couple of months. Right now I have 6 tetras, 1 small plecostomus (2" but he's 3 years old, don't know if he'll grow much bigger) and 1 full grown red tail shark. All of these will be going into the new 37 gallon tank.

I'd like to add a fish or two that are bigger than the shark and are colorful. No one in the tank right now is really colorful. I was thinking of maybe a discus or two but think the 37 gallon may be too small for that.

Is the 37 gallon with the above mentioned residents too small to add a discus or two?

What, if not discus, would be a good new resident considering it would have to be peaceful, community ok, colorful and larger than the 4" shark.

Fishin Pole 07-15-2009 03:50 PM

a 37 gallon is WAY to small for any discus, plus their special needs for the water parameters and timidness, doesnt allow for a great variety of different species to be kept with them........They also require more frequent water changes than most fish.....I know some keepers who do daily water changes for their discus...........Most fishkeepers are not that dedicated to their fish......

To make suggestions for other tankmates, it would be good to know your water's Ph and that will dictate what fish will work with your new setup............Is the new tank a hexagon tank?.........that will also play a part in what fish you could have with your current stock......

rgs1975 07-15-2009 04:14 PM


I'll test the water tonight to give you a reading. The new tank is 30" long, 27" tall and 12" from front to back. My most important criteria are color and size. I really feel like I need something to add some punch to the visual appeal. Right now the only real color I have is the tail of the shark. The size factor is because the shark is a bully unless there is a fish in the tank bigger than he is, he's 4" full grown.

rgs1975 07-15-2009 08:13 PM

The levels:

pH: 6
High pH: 7.4
Nitrate: 160
Nitrite: .50
Ammonia: .25

1077 07-16-2009 03:05 AM

You should in my view,do an immediate 50 percent water change using dechlorinator to treat the new water before it goes in the tank. Ammonia,and nitrites,should read zero in a mature or established tank and nitrAtes should be no higher than 40ppm. All of these are controlled by weekly water changes along with not overfeeding and vaccuming the gravel once a week during water changes. Your readings indicate overfeeding and lapse maint. Try reducing the amount of food you are offering and after the initial 50 percent water change, then perform smaller water changes every other day until your ammonia and nitrites are under control= zero. Water changes will also reduce Nitrates. I am assuming this is not a new tank due to the high nitrAte readings you posted. Frequent small water changes once a week will help get things in order along with feeding once a day and no more than you actually SEE the fish eat in approx one or two minutes.
Filters should be maintained regularly as well for healthy fish. Removing the filter pad,sponge.or cartridge during weekly water changes and swishing them around in old aquarium water and then sticking them back in is also a good idea only replacing the material if it begins to fall apart. Never clean biowheels and never use tapwater to clean filter material. The chlorine or chloramines in tapwater will be harmful to the beneficial bacteria that grows largely on this filter material. Perhaps you know all of this, if so,, you know what needs to be done.

rgs1975 07-17-2009 06:27 PM

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