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Old 01-18-2013, 05:53 PM   #1 
XxxXnoodleXxxX
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Unhappy Finally time to just ask...

So my betta, Cass, is in a 2 gallon tank I believe. Maybe a 1.6. Hexagonal, more vertical than horizontal. She seems quite healthy and energetic, but I still have no idea how much I should be doing water changes, or if I should break the bank and buy a new aquarium for her. Her old tank was only a gallon, so this one is a real improvement, but I just want to make sure the sweet little girl lives a long time. There's no filter, and right now we're doing a 25%-ish water change per week, and syphoning her tank of debris twice a week.

I've heard mixed reports. Some people say 1.5-2.5 gallons is just fine for one betta. Some say that's cruel. Some people say you should do one 50% change and one 100% change per week, some say two 50% changes a week, some say two 25% changes a week (for a tank 2.5 gallons or less with no filter)

Please help a guy out. I really want to make sure I've got the best I can get for my little Cass. I'm just pretty strapped for cash and don't want to have to eat dog food if I don't have to. :P
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Old 01-18-2013, 06:05 PM   #2 
LittleBettaFish
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A tank in the 1 -2.5 gallon range is fine for a single betta. If your water parameters are excellent and your betta is kept healthy and fed it is better off than probably at least 50% of bettas out there.

Personally, I like to purchase a test kit for ammonia and test my water myself.

While sometimes tests can give false readings and they aren't foolproof, if you get a better brand that has not passed its expiration date, then you are going to have a pretty good idea of where you stand in regards to water quality.

Some people will say do x amount of water changes x amount time a week, but without having actual readings you are just guessing as to the quality of your water.
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Old 01-18-2013, 06:07 PM   #3 
AyalaCookiejar
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Since there is no filter and no live plants, correct? I would do the one 50% and one 100% a week. Smaller tanks build up ammonia faster and do need more water changes. One change a week is not enough in a tank that size, with or without a filter.

If you want, since you have a vacuum, you could do a 50% and an 80-90% instead of the 100%. I'd do a 100% every so often, though, to rinse the gravel and decor.

Remember that 100% changes require you to re acclimate your fish. And a 1.5-2 gallon should be alright with proper upkeep, but personally, my smallest tank is a 4 gallon. I do keep one gallons though as hospital and quarantine tanks.
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Old 01-18-2013, 07:39 PM   #4 
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Personally on my smaller tanks (1g - 1.75g) I do one 100% water change every 5 days. No filter nor live plants in those tanks. Haven't had an issue with illnesses or fin rot/ammonia poisoning by doing it.

Adding a 50% water change mid week and a 100% at the end is not a bad idea though, as it will keep the water a bit cleaner.
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Old 01-18-2013, 09:04 PM   #5 
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I thought 100% changes were unhealthy for fish, unless they're sick? 0.o That's what I've always been told.
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Old 01-18-2013, 09:09 PM   #6 
AyalaCookiejar
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No... I don't know where you heard that from?
Dirty water is unhealthy for fish. 100% changes require you to reacclimate... but they aren't unhealthy.
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Old 01-18-2013, 09:57 PM   #7 
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Quote:
Originally Posted by XxxXnoodleXxxX View Post
I thought 100% changes were unhealthy for fish, unless they're sick? 0.o That's what I've always been told.
Each fish is a little different in care.. it also depends on the set up of the tank.

For a tank with no filter - regardless of size - it will require 100% water changes. The amount of the 100% changes is dependent upon size of tank. Normally anything under 5g you will want to do a weekly 100%, anything over 5g you will do a 100% once a month.

If you HAVE a filter, you don't do 100%s
If you HAVE live plants, you don't do 100%s

Only if you have no live plants and no filters you should be doing 100%s.
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Old 01-19-2013, 09:35 PM   #8 
XxxXnoodleXxxX
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So just one 100% change a week if it's around 2 gallons with no live plants? We syphon junk out once or twice a week. Or one 100% and a 50%?
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Old 01-20-2013, 12:58 AM   #9 
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XXXnoodle,

I may be in the minority, but I'm against 100% changes, as you have to remove the fish, which is stressful. What I do is siphon out the water until there's just enough for the fish to swim in and immediately add warm dechlorinated water. If you do that twice a week, you'll be good.

I would certainly suggest you upgrade to a larger tank, if you can afford the money and space. I've heard a 3G tank is good and my betta seems happy in mine. Others recommend a 5G...

GBose
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Old 01-20-2013, 01:11 AM   #10 
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One 50% and one 100% w/ gravel rinsing is needed for a tank of this size.

Stress mostly comes from a change in water parameters and if you do changes properly that isn't a problem.

To do a 50%, use their tank thermometer to get the running tap to the same temp as their tank. Fill up change bucket, add conditioner, then add it to the water. To do a 100%, cup them in a plastic solo cup and wrap a towel around it to hold heat while you empty, rinse and refill their tank with matching temp water. Add your conditioner, stir it up a bit to get it distributed, then slowly acclimate by floating in the tank an hour and adding a couple tablespoons of the new water every 10 minutes. Finally add them and release as little water in the cup back into the water as possible.
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