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Thanks for your replies everyone, I am a bit happier as they seem more settled and have come back down now. Never seen my red-tail up at the top before, but he is back prowling around the bottom now. Undoubtedly positioning the filter jet outlet to break the surface and aerate the water more is...

Hi foksl, I would appreciate some help. I have a 120 Jewel aquarium, 6x Harlequin rasbora, 1x angelfish and 1x red-tailed shark. To be honest, I have neglected them a bit, and I haven't taken any measurements recently, or done any water changes for many weeks. There was one plant in the tank...

Just a couple of things after reading through the thread: I wouldn't cycle with fish food if you can avoid it as they are very high in phosphate and will promote algae growth. I don't know the climate where you live but ideally you should have the tank out of direct sunlight, again to reduce...

Sorry for your loss. Don't know what other people think but I think you're right, most likely barbs have had him. Your husbandry seems in good order. I think small groups of barbs can be aggressive, the more you have the more any aggression is spread out. I guess if they're spawning then...

I have an angelfish and looked into getting a betta, but apparently they don't get on as the betta will fight other long-finned fish...

My understanding is that it shouldn't be an issue, some local water supplies have nitrates from agricultural waste. It shouldn't affect your cycle, you still need to be in a position where you can add 4ppm ammonia in the morning and have 0 ammonia and nitrites in the evening (I should point out...

You realise that this sequence is a bit odd? ammonia -> nitrite -> nitrate so your ammonia level dropped, but no waste products from the conversion were detected. Your nitrates were high initially but this may be artificial due to the nitrite assay (ie high nitrite readings interfere with, and...

Blue Ram - Microgeophagus ramirezi

I have to say by far the most aggressive fish in my tank are my biggest 3 Harlequins, more aggressive than the angelfish, blue ram cichlid and red-tailed shark despite these being called 'semi-aggressive' and the Harlequins peaceful by most every website. I also introduced Harlequins first, and...

Well he's gulping quite a bit but he's managed to eat the whole thing, then again eating a proportional 6ft sausage would make me out of breath too. Fish are great looking but not too bright, eh? I will break those things up more next time. Any thoughts on ensuring more placid fish get their...

I think this is definately a newbie question. I thought that one of my larger Harlequin Rasbora had developed a hideous disease, but when I looked closer I realised it was swimming around with most of a freeze dried bloodworm in its mouth, today being my aquarium's first ever 'variety treat day'...

I don't know anything about cichlids but could they be: Salvin's cichlid Salvin's cichlid (Nandopsis salvini) with photo / picture from your description?

Are you using a good quality liquid test kit? Are you really anal about following the instructions? The high nitrites will interfere with the nitrate assay, so this will be unreliable. Also if you allow the ammonia to get too high it will kill off the bacteria you're trying to seed and the cycle...

thanks, Unfortunately just found the little chap drifting in the filter current with just the occasional flip of the tail. Felt I had no choice but to euthanise him in ice water. I guess just keep my fingers crossed for the rest of them.

Hi guys, just a quick question, I have a 120l (approx 30gal) with the supplied Juwel bioflow 600 filter (rated 600l/hr) and a few plants in, had a red-tailed shark and 8 Harlequin Rasbora. Temp stable at 25.6-8, ammonia and nitrites 0, nitrates <5. 5 days ago I added 5 neon tetra and 6 cardinal...

I'm far from expert, but I would think if the supplement you added was a bacterial culture product, designed to speed up cycling, then that may provide enough biological filter to convert your ammonia load from two small fish to nitrite and on to nitrate; thereby causing a nitrate spike without...

Just a quick question, do small tetra species such as neons, cardinals, rummy nose, black neons etc tend to school together, or do they generally stick to their own kind? Thanks, Kev

Ok, thanks folks. I'm really keen on the angelfish, although everyone here has said to lose it from the list. What if ... single angelfish, plently of time for water adjustment... then red tailed shark then 8-10 small schooling fish: tetras or endlers Does this sound more realistic, or am I...

Hi all, I'm new to this hobby, am cycling my first tank 120l (30gal); although I'm interested in Oscars / Discus in the future, and maybe a reef tank eventually, the idea for my first tank is a peaceful 'hardy' freshwater community, with a few live plants. I've done a bit of reading, and I...