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This is a group of Corydoras pygmaeus. Picture courtesy Corydorasworld.com Ian

They look to me to be Corydoras zygatus, which is similar to Corydoras rabauti but a little larger. They are often labelled wrong with both species being called 'rabauti' here are pictures of both species. Corydoras rabauti picture courtesy Corydoras world Corydoras zygatus picture courtesy...

Play sand is idea, but it is almost impossible to get it perfectly clean. However after a couple of days of filtration it will clear. I would recommend using a bucket to clean sand or gravel in. Ian

If you only have one or two of each species then the chances of hybrids will be high. My suggestion would be to make sure that you have both sexes of each species you buy and if possible buy at least 4 of each species. Ian

There has been and still is for that matter, a recent discussion regarding warmer temperature Corys. http://www.fishforums.net/index.php?showtopic=187047 Ian

E-mail me about price and availability, don't like to talk business on forums, it's bad manners and boring to other members. Ian

I have young C. duplicareus at various stages fro 5 mm to 30 mm and I am not that far from Coventry. Ian Picture courtesy Corydorasworld.com

If the eggs are in a clear jelly as you say then it is almost certain that they are snail eggs. I don't know any fish that lays eggs in a jelly. This is a picture of some of my juvenile Gold laser Corys, They are classed as a variety of C. aeneus, but are actually closer to C. melanotaenia. Ian

It is not as fine as I would recommend for Corys, but it looks perfectly OK to use. I would recommend a fortnightly session with a gravel cleaner to make sure all uneaten food particles are removed. Ian

If the bulge was due to a bacterial infection I would have expected there to be signs of inflammation, but from the pictures I see no reddening, so I would guess that the fish has a parasite and would treat for such with Flubenol-15, if it is not a parasite the treatment will do no harm at all. Ian

From the pictures I think that your original fish are C. melanotaenia and the eggs in jelly will almost certainly be snail eggs. Ian

C. gossei, C. seussi, C. adolfoi and C. duplicareus are all species that like the warmer temperatures. Many others will tolerate being in warmer temperatures but in the long term it would be detrimental to them. Ian

Impossible to tell from that picture. Ian

Its quite simple really. The only way the blue dye will show on a fish is if there is something on the fish for it to stain. For example, if you have a perfectly healthy fish, but it has picked up some fin damage and you give it a dip in Meth. blue it is only the damaged edges of the fins that...

Pictures would be good. Ian

This is Corydoras pulcher When Isbruecker & Nijssen, 1973 described C. pulcher there was a second species within the same population, which they thought may be a colour variation, this species has two central body stripes compared to C. pulcher's single one. It is also shorted in snout length...

JohnG, It may be that your tank will be more than suitable for the Corys, I would just keep an eye on them and watch for any reddening around the mouth, if they are feeding OK and active I would think that they will be fine and providing the barbels have not deteriorated right back to stumps...

I am curious as to why you want more females in your groups than females. the normal ratio is 2 males per female. Most of those species are available at Wholesale Tropicals in Bethnal Green. I have both C. sterbai and C. weitzmani young, but these would be for collection only. Ian

A couple of questions, were the barbels intact when the Corys were introduced and how long have they been in the tank. Obviously infection preventative treatment is recommended, but I would try and ascertain the cause of the barbel reduction so it does not happen again. There are two main causes...

Have you tried Wholesale tropicals they usually have C. habrosus, if not I am breeding these fairly regularly, the only set back is I am in the West Midlands. What part of London are you in. Ian Corydoras habrosus pair Ian Fuller

You made the profound statement "Contrary to popular belief, cories dont need sand - they're fine on rounded gravel" well if truth be known the don't need gravel either, but that would bring in a whole load of other issues which is not what I want to do. All I was trying to point out was this...

Just to separate the so called emerald Corys, her are a couple of pictures. The first is Brochis splendens this has 11 rays in the dorsal fin. This is Corydoras aeneus the "Bronze Cory" clearly showing how it got it's name form the colour of weathered bronze. This species is easy to tell from...

My point was that the natural feeding action of Corys is one of filtering food particles from the fine substrate they naturally live on and it is unnatural for them to be using their barbels as shovels to move gravel. Whether they appear to be happy or not gravel is unnatural to them. For the...

Direct from http://www.flubenol.co.uk but e-mail the guy first to establish the shipping cost Ian

I would still add at least 6 if not 8 C. habrosus to that size of tank, just like C. pygmaeus they are easy to breed and will often oblige after a weekly water change. Ian

Your more than welcome. It seems that every third of forth Cory type post here is about substrate. Ian

I have to disagree, although you may be right that they don't need gravel, but it's is not their natural substrate as I have already posted here http://www.fishforums.net/index.php?showtopic=181819. Ask the question, "why do you clean the gravel" answer! because mulm, (Inert waste matter) and...

Firstly 75 gal means absolutely nothing to me, it is the footprint of the tank that determines the amount of fish it can hold. Having said that I would suggest that the species to look for, for a tank with those temperatures would be C. sterbai; C. gossei; C adolfoi or C. sussei, these species...

The tank gallonage means nothing to me, I work on the foot print or if you like the surface area. This is the main factor which determines the tanks capacity. Having said that I have kept and bred a population of about 15 C. pygmaeus in a 18" x 10" (surface dimension tank for the last 14 years...

You say fully grown, what sizes are they in SL (Standard body length). C. paleatus like most Corys will live a long time given good conditions and diet. To actually be able to determine their age would be a virtual impossibility. Ian

This is a subject that crops up all the time and there ought to be a sticky for it. However lets just look at what Corys are normally used to in their natural habitat, basically sand, silt, sometimes clay, sand and pebbles/stones, but very rarely would they encounter gravel and never at all...

You can always check your Cory id's in the thumbnail sections Here There are also thumbnail pages to help you ID your Aspidoras, Brochis, Scleromystax, C-Numbers and CW-Numbers. A note to the Mods here, this post is not meant to take traffic away from here but to help people to identify their...

The first Cory (C. trilineatus) looks like is has some faint red patches forming on the upper body. To stop this from getting any worse and to combat the snout fungus looking problem, I would do a large water change and treat the tank with a recommended dose of Melafix. BUT be sure to add at...

Sianeds, As you are in North Wales you are not tool far from Wigan and I know that Pier Aq that some C. metae (Bandits) in stock at the moment, well they had on Monday. Ian

The CSG convention 2007 was was last weekend and was all over far too quickly. I would like to thank all those that came along over the two days to support us and look forward to even more of you coming next year and also I would like to thank TFF for allowing me to promote the event here on...

Hi All, This is the last call for the Catfish Study Group's convention, which takes place this weekend. You can just turn up on either day and pay at the door, your entry fee will also entitle you to free tea / coffee all day. To see the full programme click on the banner link at the head of...

puppyduck, Look at your list of Corys and then read my post again. Basically you are not getting enough of each species. Ian

One of if not the biggest Corydoras species is C. robustus, the largest member of my group measured 105 mm SL. (4.25"). There is of course Scleromystax barbatus, which is also in the family, also grow to a similar size. To answer you question, "how many months it takes for a Cory to grow to full...

The 'Bronze' and 'Albino' are in fact the same species Corydoras aeneus. If you have species groups of Corys together and there are both sexes in each of the species groups it is most unlikely that there will be any cross breeding. It is only when people buy one of this, one of that, and one...

They are without a doubt C. elegans, the less colourful one is the female. Corydoras elegans pair picture courtesy Corydoras world.com Ian