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    Pissed at my cichlids

    Three approaches you can take 1) Less stock - give them some more space for territory and they should fight less... but with cichlids you may feel that your tank looks empty at the "right" stock levels, as they like bigger territories than we'd assume 2) More stock - heavy overstocking helps to...
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    75 gallon oscar stocking

    55G is the absolute minimum for a single oscar, and even that is only generally "accepted" rather than recommended - ie it's considered to not be enough, but as good as a lot of people are going to get. Anything else in here is liable to end up as a bloodbath. The water volume is survivable, the...
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    Positioning of inlet/outlet for two external filters

    Left = Intake for filter 1, spraybar for filter 2 Right = Intake for filter 2, spray bar for filter 1 That's how I have mine set up - the two filters "cross" over, so they take water from one side of the tank and expel it on the other. I don't think this is really necessary as the filters will...
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    Need help with Nitrates in Oscar's tank!

    Anaerobic bacteria will grow anywhere there is a flow of water which contains Nitrate but has been stripped of the oxygen: some will grow in the cracks in certain pieces of bogwood, but not to any great extent. Most normal objects do not lend themselves to this type of bacteria growth, which is...
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    male or female dempsy?

    The OP unfortunately seems to regularly mitake juvenile-juvenile or adult-juvenile behaviour as being indicative of adult-adult behaviour: ie the current relationship between adult/near adult Angels and a Juvie JD, or the previous 8" (not fully grown) JD and babies of an unspecified species. I...
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    Betta in a 25 gallon community tank?

    Firstly, don't worry about him being sad because he's lonely - seriously, Betta don't care about company and are usually far happier on their own. Other than schooling fish and when they want to breed, most fish aren't fussed about company and many resent it. Betta particularly appreciate being...
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    Need help with Nitrates in Oscar's tank!

    A 125 should be fine for Oscar and the Convicts - if you got a larger tank they wouldn't mind, but they would still produce the same amount of nitrate, it would just take longer to build up and be harder work (larger water changes) to remove. Nitrate removal needs a slow flow because the...
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    Need help with Nitrates in Oscar's tank!

    You don't need a bigger filter: you're already filtering perfectly, that's the problem. Filters turn Ammonia (very bad) into Nitrite (quite bad) They also turn Nitrite (quite bad) into Nitrate (not so bad, but not great at high concentrations) Your filter is working ideally, turning all the...
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    male or female dempsy?

    With respect, raising them together doesn't prevent aggression later. If you raise similar sized fish from young, they will naturally establish a dominance hierarchy with very little aggression and without you really noticing. If, however, you raise a smaller fish (your JD) with larger fish...
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