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Re: New tank

Subject: Re: New tank
by fcmf on 2019/1/28 16:23:56

Assuming that, and only if, you have followed this guide and process for cycling ... hless-cycling-article.htm, then you would be able to add all 25 fish at once. That is about right / a good stocking capacity for your tank size, taking into account that ~10% of the water volume will be taken up with decor, etc.

Many folk come on this forum, believing that they have cycled their tank, having been given shockingly poor advice from pet/aquarium shops that imply that leaving the tank with its equipment switched on +/- some dosing of a "starter bacteria product" for a few days achieves a cycle. The former achieves nothing other than ensuring that the equipment functions while the evidence of effectiveness for the latter is very equivocal at best. Both consequently result in a fish-in cycle and, even with very gradual introductions of fish a few at a time, put the fish under severe stress and risk for their short- and long-term health (if indeed they survive beyond the cycling phase).

If, however, you've properly prepared the filter in advance to be able to process the fish's waste by following the guide's link above, then you could fully stock the tank straight away, assuming you've kept dosing with ammonia every few days and results are returning to 0 for ammonia and nitrite within 24 hours of dosing it. If there is any problem being able to get 25 fish at once, do explain to the LFS the nature of the fishless cycle you undertook and they ought to realise that full stocking immediately is absolutely fine as the filter has been prepared to cope with that (whereas any other attempt to cycle would result in the tank being a deathtrap if stocking fully at the outset).

The fish you propose are all lovely. Species profiles are available in various locations including ... resheets.php?cat=Tropical and, so you'll be able to check in advance that your water hardness is suitable for them and that you can meet any other requirements they may have. (Your water hardness in CaCO3/PPM or dH/German degrees hardness ought to be available by inputting your postcode into your water company's website if you live in the UK.)

Most of these fish are advised to be kept in larger numbers for them to experience fewer problems, pose fewer problems for others, and display more natural behaviour, including shoaling. For these reasons, you would be better to increase numbers of each species but have fewer species - e.g. 3 species of 8 fish or 2 species of 12 fish.

Hope this is helpful.