Search found 2789 matches

by Bas Pels
Sat Jan 23, 2021 9:02 am
Forum: Taxonomy & Science News
Topic: Electric catfish are protected from electrical shock
Replies: 2
Views: 90

Re: Electric catfish are protected from electrical shock

Too bad I can't read the whole article for lack of a password. The thing is - I wonder what was done with, to the goldfish. Now I am not against feeding life fish - many other people are, but I'm not - but using a goldfish to be electrocuted, either more than once, or to let it life later, would be ...
by Bas Pels
Fri Jan 22, 2021 8:03 am
Forum: Speak Easy
Topic: Is it ethical to export old fish?
Replies: 9
Views: 262

Re: Is it ethical to export old fish?

I think you are right asking this question. After all, small fish don't breed, yet, but large fish do. If one would take out 50 % of the fry from one season, the other half will have a greater change of growing out to maturity - there is more food, predators will find other prey. Therefore, taking o...
by Bas Pels
Thu Jan 21, 2021 4:01 pm
Forum: South American Catfishes (Callichthyidae - Corys et al)
Topic: Corydoras Pygmaeus water paramters
Replies: 13
Views: 968

Re: Corydoras Pygmaeus water paramters

Hardness, just as conductivity (your TDS measurement is a condictivity measurement) are all linear scales. That is, if 2 units are around, the reading will be twice as high. So yes, 2 parts RO and 1 part tapwater of 18 GH will make 6 GH in total. pH is another matter. Firstly the scale is logarithmi...
by Bas Pels
Thu Jan 21, 2021 7:49 am
Forum: South American Catfishes (Callichthyidae - Corys et al)
Topic: Corydoras Pygmaeus water paramters
Replies: 13
Views: 968

Re: Corydoras Pygmaeus water paramters

I would never use CO2. Because it is the stuff our fish breath out, putting more of it into the water will make it harder for the fish to get rid of their waste product, resulting in more acidic blood. Now if one needs a low pH, there are other, better solutions. lowering the pH with peat, old leave...
by Bas Pels
Sat Jan 16, 2021 8:24 pm
Forum: Tank Talk
Topic: Making Blackwater
Replies: 13
Views: 880

Re: Making Blackwater

I'm surprized your rainwater is pH 7.0. As we all know, CO2 is one of the gasses in the air, and this one does dissolve rather good. CO2 is also known als carbonacid, and it does make your water tart. Still your rainwater is pH = 7.0. I would assume something, perhaps a concrete roof dissolves a bit...
by Bas Pels
Thu Jan 14, 2021 7:41 am
Forum: Taxonomy & Science News
Topic: Brain development in Microglanis garavelloi
Replies: 1
Views: 196

Re: Brain development in Microglanis garavelloi

During the maturation process, a series of hormonal events result in the development of some secondary sexual traits in the brain of male specimens, like faster growth rate of brain areas linked to motor control, olfactory and visual responses. To me, this would suggest that adult males will be look...
by Bas Pels
Sat Jan 09, 2021 8:31 am
Forum: Speak Easy
Topic: Fish Tank Water for Tillandsia - Opinions?
Replies: 2
Views: 226

Re: Fish Tank Water for Tillandsia - Opinions?

I would be very carefull with dipping tillandsia in fish water. Remember, in South America the thrive on rainwater only. Good, this rainwater has been spiked with Saharasand, and is therefore slightly more ferilised than one would expect, but all my tanks contain far, far too much nitrate and phosph...
by Bas Pels
Thu Jan 07, 2021 8:48 pm
Forum: Speak Easy
Topic: What's agamous?
Replies: 16
Views: 531

Re: What's agamous?

Where many cichlids are rather insensitive towards crossbreeding, this species Oreochromis mossambicus produces with the related O niloticus infertile offspring. Now this is a huge advantage, fertile Oreochromis start breeding at 6 cm or smaller, and infertile ones just grow, untill cought and eaten...
by Bas Pels
Wed Jan 06, 2021 8:32 pm
Forum: Speak Easy
Topic: What's agamous?
Replies: 16
Views: 531

Re: What's agamous?

The correct English pronouncation is not always predictable from the spelling, but I never heard the same spelling has different pronouncations depending on the meaning. You put me in uncharted waters, Victor.
by Bas Pels
Wed Jan 06, 2021 2:50 pm
Forum: Speak Easy
Topic: What's agamous?
Replies: 16
Views: 531

Re: What's agamous?

I would expect so, as the a in agamous will have the same meaning as the a in atypical. That is, anti. Or just `not´.

Woud you pronounce the mous part similar to mouse . the rodent?
by Bas Pels
Tue Jan 05, 2021 10:43 am
Forum: Speak Easy
Topic: What's agamous?
Replies: 16
Views: 531

Re: What's agamous?

If I read `Ovophilic, agamous` I would assume both words to refer to reproductive behaviour. Now it does complicate that agamous also has a meaning in cell biology, but here it must refer to pair bonding, as Siluris wrote. Apart from that, fish base writes about normal situations in nature. And any ...
by Bas Pels
Wed Dec 23, 2020 9:59 am
Forum: Tank Talk
Topic: busted heater
Replies: 15
Views: 760

Re: busted heater

Apart from the personal savety issue - I heard in Sweden people are supposed to unplug heater before getting their hands wet, which would solve this problem nicely - it is always possible to calculate the needed capacity of a heater, and use two heater of half this value. A square meter will loose 6...
by Bas Pels
Thu Dec 17, 2020 7:36 am
Forum: South American Catfishes (Everything else)
Topic: New group of 6 Microglanis iheringi... or are they?
Replies: 69
Views: 6842

Re: New group of 6 Microglanis iheringi... or are they?

Can't say I see any white spot in this saddle.

The edges are white, but that looks like an artifact to me.
by Bas Pels
Thu Dec 17, 2020 7:31 am
Forum: South American Catfishes (Everything else)
Topic: Salt and Rafael cats
Replies: 14
Views: 1027

Re: Salt and Rafael cats

fishguy1978 wrote: Mon Dec 14, 2020 10:47 pm
Bas Pels wrote: Mon Dec 14, 2020 7:53 pm Reme3nber, take 3 days to get there
How detrimental would it be if I added all 40 grams same day?
Can't say, I never tried it.
by Bas Pels
Tue Dec 15, 2020 7:51 am
Forum: South American Catfishes (Callichthyidae - Corys et al)
Topic: Raising Corydoras fry in bare bottom tanks
Replies: 11
Views: 968

Re: Raising Corydoras fry in bare bottom tanks

While not catfish, let alone Corydoras, whgen I was raising cichlids, I always used docorated tanks, with plants and a sand substrate. Obviously, such a tank cannot be kept sterile. But then, fish raised in sterile conditions will not have a very well developed immune system. That is, I don't think ...
by Bas Pels
Mon Dec 14, 2020 7:53 pm
Forum: South American Catfishes (Everything else)
Topic: Salt and Rafael cats
Replies: 14
Views: 1027

Re: Salt and Rafael cats

Reme3nber, take 3 days to get there
by Bas Pels
Mon Dec 14, 2020 4:00 pm
Forum: South American Catfishes (Everything else)
Topic: Salt and Rafael cats
Replies: 14
Views: 1027

Re: Salt and Rafael cats

I've had the related Platydoras costatus for 27 years, and every now and then I cured with salt. Never more than 3 g/l, bringing this up with 1 g/l per day

I trust you can count with metrics.
by Bas Pels
Tue Dec 08, 2020 7:48 am
Forum: Speak Easy
Topic: Dumb things we have done
Replies: 12
Views: 1011

Re: Dumb things we have done

After emptying my 4 meter tank, to get rid of a plague of Amatitlania nigrofasciata, the convict cichlid, but this was a rather nice looking variety from Guatemala, bangfull of corour, but 50 or more was way too much, I put Neetroplus nematopus in the tank, resultikng in another plaque. Both species...
by Bas Pels
Tue Dec 08, 2020 7:42 am
Forum: South American Catfishes (Loricariidae - Plecos et al)
Topic: Plants for high flow pleco breeding tank
Replies: 13
Views: 1058

Re: Plants for high flow pleco breeding tank

Narelle is right in pointing out that plants need various inputs in order to grow, and quite often light is the limiting factor. However, CO2, phosphates and nitrates are wasteproducts from animals, and fish prefer to have low levels of these. Fish generally are no fans of excessive lighting, and th...
by Bas Pels
Wed Dec 02, 2020 8:08 am
Forum: South American Catfishes (Loricariidae - Plecos et al)
Topic: Plants for high flow pleco breeding tank
Replies: 13
Views: 1058

Re: Plants for high flow pleco breeding tank

While Vallisneria likes harder water, Sagittaria subulata looks a lot like them, prefers soft water and might be precisely what you are looking for. Frankly, they are hard to tell apart. This tapered shape of the leaves under water is common in Sagittaria. Sagittaria means arrow, but this refers to ...