Fluval 57l Tank Fish Wantlist?

Otos are lovely, but delicate fish that need really stable water parameters, a group of six or so, and need a really established tank before being added. Once a tank has been established for three months or so, then there's more likely to be enough food for them, but not good for a brand new tank, or potentially unstable water parameters.

OP if you like the look of otos, hang on getting any until your tank has been up and running for three months, and do a lot of reading up on them first. They're all wild caught and are often starving and weak by the time they've reached a store, so leads to a lot of losses. Even with a very stable, established tank and having researched a lot, I still lost one from each batch I've bought. Lovely little fish, but very delicate.
 
There's a conversion calculator on here which has all sorts in, including hardness
it's in the Useful Links box.

@Diab2005 There are at least half a dozen units for hardness but fish keeping uses just 2 - ppm and dH.

5.3 deg Clarke - 79 ppm and 4.4 dh.


I don't find Seriously Fish hard to navigate - I just type the name of the fish into the profile search box. Occasionally it doesn't find the fish I want so I use google as PheonixKingZ suggested. I also find that it doesn't recognise some common names as it uses a different one. And the genus of many fish changes (that's the first half of the scientific name) so it doesn't recognise the old name. The species name (second half) rarely changes and I often find the fish I want by searching for the species name alone.




The other thing to bear in mind is that the Fluval Flex is more of a cube so it has less swimming room than a 57 litre rectangular tank. This means small, slow swimming fish as there isn't enough swimming length for fast swimmers.
 
Agreed. The Flex is 40x40 cm (and the depth includes the filter chamber), so it is very much in nano territory. Great tank but it is quite limiting for stock options. WIth your soft water you should look at species like ember tetra, chillie rasboras and dwarf corys.
 
Thanks for the advice guys, I got my head round seriously fish in the end. I actually won a bid on an aqua one ufo 550 in the end, considerably bigger so think my choice is improved.

Definitely getting neon tetras, cichlids ,(soft water kind type) and corydoras is it?

I saw some lovely gold mollies which I would love to have but know they are hard water. I've read that as they have been raised in similar water it doesn't really cause an issue, aware this is opposite to what some of you have advised?
 
Unfortunatley, the water they were bred in makes little difference. They have evolved over thousands of years in a certain type of water and a few generations in a different type is not long enough to change their DNA.

For soft water, look at dwarf cichlids from south America. There are many species of apistogramma, and you sometimes see nannacaras in shops.
 
Perfect. Just picked up my 78l 550 ufo. Anyone know if I can put sand in this, cant work out if the filter is under floor or not?
 
According to the manual it has a trickle filter - that's the type that is located in the lid; water is pumped up into it, passes through the filter media then back own into the tank. Sand will work fine as long as there's a gap between the top of the sand and the bottom of the intake tube.
 
Thanks for checking mate that was my conclusion too but felt it best to double check
 
Its the search box lower down the page or as others mentioned Google the type with seriously fish after it
 

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