Getting my 29g water right for mbuna

beatle

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Dec 7, 2005
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Alexandria, VA
www.mdbbox.com
I've been cycling my 29g for the past 2 weeks, getting it ready for some Malawian cichlids when it finishes. I'm using crushed coral as the substrate. Here's what my tap and tank look like:

Tap (after adding prime):
kH - 300ppm
gH - 150ppm
pH - 7.2
Ammonia - 1.0ppm!!!!

Tank:
kH - 180ppm (???)
gH - 150ppm
pH - 8.0
Ammonia - 5.0ppm (still cycling)

Now, shouldn't my kH be higher in the tank thanks to my crushed coral? I'm still learning what these terms mean and how they are adjusted, so bear with me. I've read so many things about what the kH and gH should be for a Malawi-ish tank that my head is starting to come around on its 10th rotation. One thing I've noticed is that people refer to hardness in degrees, not ppm, so I've been dividing my amounts by 17.9 to get degrees. Is this correct? Also, should my general hardness be around 350 - 400ppm? My Jungle test kit only goes to 300ppm. Is there another kit available that goes higher? I'll be adding appropriate amounts of baking soda and epsom salts at each water change.
 
I'm not very familiar with the chemistry for Lake Malawi, but I do know that during the cycle, your KH will get eaten up naturally. The crushed coral should help, but that also takes a little time to start affecting the water, from what I have gathered. The doses of ammonia that are used in a fishless cycle are typically much higher than will actually be produced once you have fish in the tank, so more KH will be eaten more quickly than normal. Also, you aren't changing water during the cycle, so you aren't replenishing your KH via the tap like will happen once you have fish in there.

PS - You note that you've been cycling for a couple weeks. Have the nitrItes begun showing up yet? If so, you should drop the ammonia level to 3.0ppm instead of 5.0ppm.
 
Nitrites are in full force now, reading at the top of the chart on my test kit. I have dropped the amount I've been adding to about a tsp. per day (I started with 1 Tbsp). I guess I'm just confused as to what kH does. I did change some water when I added my feather rock earlier this week, but that's about it.

Also, should I add any additional treatment to the water for the ammonia present in my tap water?
 
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all this trouble with water chemistry will be wasted on malawi cichlids. a 29 gallon tank is far too small to successfully house these species ... you will not be able to avoid their natural polygamous spawning aggression in such cramped quarters and many of the fish are going to get killed by what ends up to be the dominant male.

55 gallons minimum for malawi cichlids if you want to be successful.
 
Any comments on the questions I've asked?
as in, you don't want to be confused with facts cuz you're going to do what you want anyway?

the chemistry of lake Malawi is: kH 180-240 ppm, gH 160-280 ppm, pH 7.7-8.6.
 
I agree.... I honestly do not want to give you adivce on how to keep malawis if your going to keep them in a 29 gallon long term. Using it for a grow-out tank is fine though, and you should be thinking of getting at least a 55 gallon set up for them in the near future. I started with a 32 gallon for my malawis and within 6 months they were upgraded to a 90 gallon, and trust me, it was very nessecary.

I think you are too concerned with your water hardness. Get a good african cichlid substrate in there and it will buffer your water to the nessecary levels. Just make sure your pH is good, thats the most important.

Its strange that you would be testing ammonia in your tap water.... but there are products available (such as ammolock) that will help remove ammonia from your tap water. You can also get dechorinator that will also remove ammonia. What test kits are you using?

Also visit this site if your looking into malawi cichlids: http://www.malawimayhem.com. There are some good articles about setting up your tank and proper water chemistry.


:)
HTH
-Diana
 
I'm just getting back into fish keeping from when I was a kid. If I lose interest in fish before they grow out, I'll sell/give them away, or I'll buy a 55 for them when they're grown. They grow slowly as well, so as long as your definition of "the near future" is a year or so, then we're on the same page.

I'm using an Aquarium Pharmaceuticals test kit I bought mid-December of 05 from Petsmart. My 20g tank with my angelfish tests 0ppm (it's established) so I'm guessing the water here in Northern VA is really toxic. :) Maybe they're pulling it straight from the Potomac? :o
 
Haha.... well its not good your water is testing ammonia. Although, I do recall someone saying chlorine may trigger the test to show ammonia? I dont quite remember. Also something about ammonia creating chloramines which are used to kill bacteria.... so sometimes ammonia is added to the water. Maybe contact your local water department and ask them some questions.

Africans actually do grow quite quickly, of course depending on how frequently you do water changes and how much you feed them. I would aim to upgrade in about 6 months. If it cant be until about a year, maybe start with species that will fare better in that size tank for longer. Yellow labs, for example, are one of the few choices. Rusty cichlids may work as well. This is not really because of thier size, but because of thier temperment. They are less-aggressive and wont kill each other off in a smaller tank. Most other mbuna will...

You could also look into Lake Tangynikan cichlids, which require a very similar water chemistry and biotope. You can get some really awesome smaller sized cichlids, such as shelldwellers (love em).

There are so many possiblities out there :).... but I do fancy the malawis.

;)
-Diana
 
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