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Sorry this is a really dumb question :oops: but how do you calculate how many fish you can have in a tank? I've read its 1cm of fish per 25cm2 of water but I'm struggling to work that out So if my tank measures Depth 28 cm Height 34 cm Width 75 cm ... how many fish? Thanks Paul

In July our Molly gave birth for the first time, we managed to get 12 of the babies into a breeding net before the other fish ate them. All survived and we released them into the main tank last week, where they are doing fine. The Molly has now just given birth again, this time we've got...

Got home from work to find 15 little molly babies :D I've got them in a plastic sieve that floats so they can't get out and the bigger fish can't get in, put a bit of plant material in as well I'm a real novice so anything else I need to do? Thanks Paul

Recently I’m finding I have to clean my filter once a week as the sponge gets saturated in brown gunk which then reduces the flow of water from the filter. If I leave it more than a week the fish can be seen at the surface as if gasping for air. The filter is a Rena Internal 70 Gph / 300 l/h...

I've got a 92 litre tank, cycled 4 months ago, stocked with - 2 clown loaches 3 black widows 3 platies 3 mollies 2 algae eaters I do fortnightly water changes but on testing the water before yesterdays change the nitrite level was very high, almost in the toxic scale. I did a quarter water...

My tank has been established for nearly 3 months (after cycling). We had 3 black widows, 3 black tuxedo platies and 5 guppies. Approx 20 days ago we introduced 5 more guppies (bag in the water, lights out etc). After a few days one guppy died and we noticed that most of the guppies had...

Last Sunday we introduced 5 more guppies to our 92 litre tank, it already had 3 black widows, 3 platies and 4 other guppies. The other morning I found one of the older guppies dead with its tail fin really damaged, almost torn off. This morning 4 guppies are showing extensive damage to their...

Bought 6 neon tetras yesterday but after adding them to the tank and a couple of hours later turning the lights back on, noticed that 5 had white spot. I've taken them out of the tank and will be returning them to the store but is the tank now infected? Do I need to take preventative measures...

I'm new to this fish 'thing' but have to say its a fascinating hobby! ... and onto another question My tank is 92 litres and after 6 weeks fishless cycling has been established for approx 5 weeks with 4 black widow danio's. Water quality is fine. On Sunday we added 3 black tuxedo platies and...

My tank is 92 litres and after 6 weeks fishless cycling has been established for approx 5 weeks with 4 black widow danio's Today we added 3 black tuxedo platies and 4 male guppies The guppies won't leave the platies alone even though they are smaller. At the store both fish were labelled as...

Can I add warm water to the tank for a water change? Can it come from a kettle, hot tap or must it be cold? Thanks Paul

Well it took 6 weeks in the end to complete the fishless cycle, just wish I'd found this place earlier than taking advice from the guy in the fish shop who clearly didn't have a clue! Anyway the good news; I've now got 5 black widow tetras in the tank (92 litre), all doing fine. When would it...

I'm a novice at this so please bear with me Bought my first tank (92 litre) 3.5 weeks ago, all the books i've read say it should take about 2 weeks to cycle but you can help the process by adding a bacteria substance like stress zyme. I've done this but the nitrite level is still too high at...