How many fish can i have ? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 14 Old 10-13-2009, 07:43 PM Thread Starter
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How many fish can i have ?

hey i have a 70 litre tank and was wanting to know how many fish i would be able to have in it, i allready have 8 fish and 3 snails, they are -

2 x ballon mollys, 2 x swordtail, 2 x plattys and 2 x albino corys with 3 small snails.

am i able to have any more,

any suggestions would be good thank you .
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post #2 of 14 Old 10-13-2009, 08:03 PM
What's your filtration?
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post #3 of 14 Old 10-13-2009, 08:16 PM
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We will need to know more details, like your filtration as already stated, and your maintenance schedule.

70 liters isn't a rather large tank, so you will need to do more frequent water changes to accommodate the heavier bio-load.
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post #4 of 14 Old 10-13-2009, 08:19 PM
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honestly regardless of your filtration i wouldn't get any more fish but thats just my opinion.
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post #5 of 14 Old 10-13-2009, 08:36 PM
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Feel free to elaborate, MoneyMitch. All opinions should be accounted and any details for advice would be great.

His tank is just under 20 gallons, which isn't very large, and 8 fish do seem like a substantial amount. I am also leaning on the fact that 8 fish is fine for a tank that size and I wouldn't recommend adding any more.

I'd suggest getting a larger tank.

I am still curious on your filtration, and your maintenance schedule (water changes/gravel vacuuming).
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post #6 of 14 Old 10-13-2009, 10:48 PM
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the way i do things is for average size fish i take the tank size divide it by two then take like 2-3 away and come up with the amount of fish to put in. of course this can have variables but it has always worked fine for me.,
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post #7 of 14 Old 10-14-2009, 02:11 AM
As a rough guide, 1cm of fish per litre is seen acceptable, but once you start putting substrates you in you must account for displacement. so once displacement has been taken into place you left with about 65cm of stocking, that is about 13*5cm fish.

so your current stock brings you up to about 50cm of stock, which leaves you with 15cm which i would use to add 3 more cories as they do prefer to be in groups!

This method only works with fish under 10cm, any larger and you have to think logically, i dont bother using stocking guides any more, I put fish in my tank and when it appears that there are enough fish, i stop!
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post #8 of 14 Old 10-14-2009, 02:27 AM
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Quote:
Originally Posted by Jack Middleton View Post
As a rough guide, 1cm of fish per litre is seen acceptable, but once you start putting substrates you in you must account for displacement. so once displacement has been taken into place you left with about 65cm of stocking, that is about 13*5cm fish.

so your current stock brings you up to about 50cm of stock, which leaves you with 15cm which i would use to add 3 more cories as they do prefer to be in groups!

This method only works with fish under 10cm, any larger and you have to think logically, i dont bother using stocking guides any more, I put fish in my tank and when it appears that there are enough fish, i stop!

again dont mean to say your wrong agian in another post jack, but the 1 inch per gallon rule or 1 cm per liter rule isnt advisable and many people will back me on this i can even have them chime in if you like ;) as i stated above in this thread has been a proven method to keep my fish safe and healthy. yeah you can go by that rule but you risk disease stress frequent maitnance and even fish loss.
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post #9 of 14 Old 10-14-2009, 05:30 AM Thread Starter
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im not to sure what type of filter i have, i have got a blue planet tank which came with a filter on the tank cover also with a light. but i do not know what type it is, it is about 20 cm long and 7 cm across. sory i couldnt give you more info on that

but for maitanance

i recently had high ammonia and nitrate levels so i do 2 changes a week, 1 on wednesday which i take out 10 litres and nother 20 litres on friday,

also i have a nother question, when the tank goes through its nitrogen cycle the bacteria is ment to go from ammonia into nitrite and from nitrite in to nitrate, right ?

because my tank missed the nitrite part, i had high ammonia levels and then out of no where i got high nitrate levels but i got rid of the ammonia, and from when i started the tank(2-3 months ago) to now the nitrite level have never been bad its always been good. is this normal ?

tank is sitting at a :

Ph of 7.6
Ammonia 0.0
Nitrite 0.0
Nitrate 10 to 20
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post #10 of 14 Old 10-14-2009, 10:53 AM
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there is no way that it skipped step 2 but the levels you are showing now are fine
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