Search found 190 matches

by Lycosid
Sat Mar 27, 2021 10:26 pm
Forum: Asian Catfishes
Topic: Mysterious behavior in Kryptopterus macrocephalus
Replies: 5
Views: 4761

Re: Mysterious behavior in Kryptopterus macrocephalus

Now you know what happened, and how to prevent this from happening again, I think the chamber can be used again for your research. Yes, I think we have a good strategy for preventing the pressure build-up now. I suspect that we didn't have issues with K. vitreolus because we had the bubble release ...
by Lycosid
Thu Mar 25, 2021 10:54 pm
Forum: Asian Catfishes
Topic: Mysterious behavior in Kryptopterus macrocephalus
Replies: 5
Views: 4761

Re: Mysterious behavior in Kryptopterus macrocephalus

I'm going to update this since I think the mystery is solved. The catfish died the next day. Symptoms appeared consistent with a damaged swim bladder. This made me suspect that the fish had been exposed to high pressure in the chamber. Sure enough, my RA and I played around with the larger chamber (...
by Lycosid
Mon Mar 22, 2021 9:18 pm
Forum: Asian Catfishes
Topic: Mysterious behavior in Kryptopterus macrocephalus
Replies: 5
Views: 4761

Mysterious behavior in Kryptopterus macrocephalus

In lab we have a respirometer for fish. The fish goes in a clear tube (the chamber) with a sponge-covered intake on one side and a sponge-covered outlet on the other. The respirometer pushes water through the chamber, measuring the oxygen levels coming out, and switches between circulating the old w...
by Lycosid
Sat Dec 26, 2020 3:47 pm
Forum: Tank Talk
Topic: busted heater
Replies: 15
Views: 4392

Re: busted heater

Are there any heaters that "fail-to-off"? I know that the standard bimetallic strip thermostats are set up so that they are permanently on when they fail, but are there heaters that go off when the thermostat fails? Given that cold is less immediately lethal to many fish than heat that see...
by Lycosid
Tue Dec 08, 2020 1:22 am
Forum: Speak Easy
Topic: Dumb things we have done
Replies: 12
Views: 2926

Re: Dumb things we have done

The heater needed to be at 78 degrees (F, obviously). I'm looking at the low-contrast numbers etched in the thermostat control on the heater and carefully set it for the one that ends in 8. A month later I have my arm in the tank and it's a lot warmer than the tank next to it, which is supposedly at...
by Lycosid
Sat Nov 21, 2020 12:17 am
Forum: South American Catfishes (Callichthyidae - Corys et al)
Topic: Bad incident, take some caution
Replies: 31
Views: 7651

Re: Bad incident, take some caution

It also makes me think the interaction of that unknown chemical and a fish organism must drastically differ in the mechanism and/or intensity versus human organism; otherwise, this would have been noted long ago and adjusted but as is, it doesn't present danger to humans. Well, for us it's on our s...
by Lycosid
Mon Sep 07, 2020 12:37 am
Forum: South American Catfishes (Loricariidae - Plecos et al)
Topic: Getting L204s back into conditions
Replies: 3
Views: 1520

Getting L204s back into conditions

I just got 3 L204 ( Panaqolus albivermis ) but they're definitely semi-starved. (The place I got them doesn't ever feed plecos correctly, and they were supposed to call me when they came in, but they called the wrong number and so the plecos sat in their care for a while.) I have them in a 55 gallon...
by Lycosid
Mon Aug 03, 2020 8:33 pm
Forum: Tank Talk
Topic: About filtration
Replies: 81
Views: 49267

Re: About filtration

I have Walstads book on its way in the mail but I have not read it. However I have suspicions that she is attributing too much to the plants and too little to microbes. I have Walstad's book. I thought it was very good. Disclaimer: I also know Diane Walstad (although not well). Disclaimer to the di...
by Lycosid
Sun Aug 02, 2020 4:38 pm
Forum: Tank Talk
Topic: About filtration
Replies: 81
Views: 49267

Re: About filtration

It seems like Mankysanke is claiming that the center is more negative (and, obviously, the outside is full of positive ions) which causes the ammonia to "switch partners" constantly, moving inwards each time. This sort of behavior is possible for ionic bonds, which are not bonds between t...
by Lycosid
Sat Aug 01, 2020 12:32 am
Forum: Tank Talk
Topic: About filtration
Replies: 81
Views: 49267

Re: About filtration

Reading "Mankysanke's" explanation it seems reasonable but for one thing and that is that the negative charge of the clay particles constantly draws the positive ammonia toward the center. Why doesn't the ammonia stick to the first negative ion exchange surface it hits? If I am right and ...
by Lycosid
Wed Jul 29, 2020 2:38 pm
Forum: Asian Catfishes
Topic: Krytopterus vitreolus constitution
Replies: 8
Views: 9520

Re: Krytopterus vitreolus constitution

One interesting thing of note: the fish in the left of the picture has lots of black pigment all throughout its body, on the bone the notochord, the skull, eyes, etc,. It was the last of a batch separate from the others. I'm guessing its a wild caught fish. Opinions? Well, to the best of my knowled...
by Lycosid
Sun Jul 19, 2020 9:20 pm
Forum: Tank Talk
Topic: My Public Aquarium: exhibit blues - how to make them?
Replies: 522
Views: 232804

Re: My Public Aquarium: exhibit blues - how to make them?

That seems a novel, innovative thought to me :) Thank you so much for it. Gotta think how to offer ourselves to potential clientele. How is this done? Through personal connections or is there a web-based service that connects educational institutions with the "people out in the field and the e...
by Lycosid
Sun Jul 19, 2020 5:22 pm
Forum: Tank Talk
Topic: My Public Aquarium: exhibit blues - how to make them?
Replies: 522
Views: 232804

Re: My Public Aquarium: exhibit blues - how to make them?

***I am not open yet, don't have the Certificate of Occupancy, and this activity would then be probably of some unlawful kind. So I know you're in Florida, where the official position on coronavirus is that if we don't talk about it it can't get us, but for lots of parts of the country people are w...
by Lycosid
Fri Jul 10, 2020 5:20 pm
Forum: Other Catfishes
Topic: Are Columbian sharks ok with full saltwater?
Replies: 19
Views: 11588

Re: Are Columbian sharks ok with full saltwater?

Someone said on another forum that they acclimated their fish straight from freshwater to marine the fish were fine in a reef tank for a short while then died, so no I’m stuck, did the salinity kill them or the reef environment. The salinity change, probably. You might be able to survive in very wa...
by Lycosid
Sat Jun 20, 2020 6:15 pm
Forum: Other Catfishes
Topic: Are Columbian sharks ok with full saltwater?
Replies: 19
Views: 11588

Re: Are Columbian sharks ok with full saltwater?

Ok I increased the salinity of the aquarium from 1.005/1006 to 1.007 and this appeared small lumps across the fishes sides I have a picture I will attached then the columbian shark keeper I was talking to advised me it maybe parasites and more salt will kill the parasites so I increased the salinit...
by Lycosid
Sat Jun 13, 2020 12:02 am
Forum: South American Catfishes (Loricariidae - Plecos et al)
Topic: Creating ideal conditions for L260
Replies: 8
Views: 2694

Re: Creating ideal conditions for L260

If the goal is more oxygen and not actually more current then why not just use airstones? The argument I generally hear against airstones is that very little oxygen actually exits the bubbles into the water. This is probably true. However, the reason powerheads oxygenate water is that they "sti...
by Lycosid
Thu May 21, 2020 3:20 pm
Forum: Other Catfishes
Topic: Need more help with my columbian sharks please
Replies: 33
Views: 17734

Re: Need more help with my columbian sharks please

As for the big deal over using reverse osmosis trying to say I’m not right if it’s so abnormal why do so many fish stores use it? Why are aquarium reverse osmosis units made? Huh? Why does the aquarium salt companies suggest using it? YouTube is full of videos of people using it, and plenty of prod...
by Lycosid
Wed May 20, 2020 9:31 pm
Forum: Other Catfishes
Topic: Need more help with my columbian sharks please
Replies: 33
Views: 17734

Re: Need more help with my columbian sharks please

There is no stress or issue with the cycling as there’s no free ammonia thanks to prime and stability my ammonia alert confirms this as does API test kit, eventually the tank will cycle until then the ammonia and nitries are being bound and not toxic. There's always stress in moving fish. Can't be ...
by Lycosid
Tue May 19, 2020 10:17 pm
Forum: Other Catfishes
Topic: Need more help with my columbian sharks please
Replies: 33
Views: 17734

Re: Need more help with my columbian sharks please

UV sanitizer would be an overkill in my humble opinion but many people, especially who own very rare and expensive fish, opt to have one. I have one, but I've only ever used it to try to control a mycobacterium outbreak. I don't leave it running in any tank normally. Let's review the problems: 1) T...
by Lycosid
Sun Apr 26, 2020 11:55 pm
Forum: Tank Talk
Topic: Marc's fish room build
Replies: 272
Views: 157017

Re: Marc's fish room build

Apparently I've missed some updates here. Quick comments: I've also had fish swim through uplift tubes into the space behind Mattenfilters. For glass catfish I've jammed a slice of plastic into the tube, splitting it into two halves which are each small enough that the catfish doesn't want to go thr...