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I see nothing that suggests columnaris. Your otto got a broken hard ray on its dorsal fin, probably from having been snagged with a net when catching it at the store. If it survives, it will loose permanently the portion of the dorsal fin that is currently hanging. Whether it will survive is...

It sounds as if you did not have granite, but marble. Granite is an igneous rock, rarely if ever associated with fossils. Usually chemically stable, good for aquarium. Marble, fossils, carbonate rocks.

With much respect to Dr. Tim, the whole point is mute with me. No need for liquids or potions good or bad. If I need to set up a new tank, I always have plenty of seeded media to do it. Large quantities. The rest, water changes will cover it. Free (not really) but not paying pocket cash and not...

Tell her they are all HER tanks. We are at Reina 1-6 tanks (+ q-tank). In Reina 1-2, she gets to pick species compositions. Of course at water changes they are all Rey 1-6. But it has sort of worked. Despite that, at this time, no more tanks for me.

What you are seeing in your fish, and in the link you posted is very interesting and cool, but there is nothing unusual about it. It simply shows the normal process of expression of secondary sex characters in Metynnis fasciatus (tiger dollars), which more or less follow a similar path as that...

Couple of comments. Going by your numbers, something may be amiss - NO2 (nitrite) should always be zero in a well stablished tank. NO3 (nitrate) at 80 is way too high. Perhaps you are not changing enough water? It should be as absolutely low as possible, with levels over 20 being too high. How...

Also hydra (freshwater) are cnidarians and are quite common. There are, however, no freshwater corals (cnidarians), nor any freshwater echinoderms of any kind. For echinoderms, there is also no evidence that ever there were any in the past (geological history). Why? it appears they simply never...

I agree that it could be a heater burn, but it is hard to tell. It does look like an injury, rather than a disease. What is very important is to make sure water quality is excellent (better than normal), to avoid/combat secondary infections (bacterial, fungal) which very commonly occur on top...

The plant shown is not an Amazon sword. I don't know its name but I have seen it. It is not an aquatic plant, but terrestrial. At best, riparian in nature (edge of streams or partially inundated areas). It will not do well submerged permanently. Although resilient, in time it will die if...

Nice looking! What's up with the coins? Perhaps if you lay down paper bills, more demanding plants will do well for you? Cheers!

A small power filter is fine, and a prefilter helps a lot with keeping things out. One can also shorten the intake tube. And then, there is sponge (air driven) filters, as suggested.

I currently have a pair of young adult angels that I grew from babies, and now they have spawned twice. They are in a tank with 3 pearl gouramis (1 male, two females), a few cories and 2 BN plecos. They share a 75g with lots of plants and hideouts. No problems at all. I don't have neons in that...

Nice! Theose are definitely "tiger" SDs, Metynnis fasciatus. They seem quite young. Better pictures may help, but probably gender differences are not yet clearly shown or at all. Usually, females would have a more red anal fin (than males) from fairly early, but the gender differences in shape...

Since all my loaches are still relatively small (3" +), I can't say what larger ones would do with small tetras. However, I have a 75g where a group of 4 clown loaches, 12 neons and 10 Colombian tetras have been part of a planted 'community' for about 2 years (yes, I now geographically...

Agree with the notion that spotted ones don't mimic the tiger pattern. Referring to the overall group of silver dollars (SDs) of the genus Metynnis, common names are generally "regular", "spotted", or "tiger". There are others, but less common or less well known. However, because there are...

I don't often order plants (or fish). However, my experience with Aquariumplants.com has been excellent (3 times in the past several years). I have ordered from a couple of other sites but prefer the former.

Congrats!!!!

Almost certainly not snail eggs (or not any of the common types). Look like cory eggs. Do you have cories? You are going to be a parent! Hopefully they will develop well.

Another type of fish to consider in the Congo-spirited tank are African characins of the genus Distichodus (Distichodontidae). Although for a long time only D. sexfasciatus and D. lussuoso were about the only types available with any frequency, several smaller and very beautifully colored...

I thought I could solve the puzzle, but I guess I can't. I have a bag purchased 1 year ago (Dec. 2022). It is still unopened as I still had a few left over from another bag. Well, the "new & improved" seal was already appearing on my Dec. 2022 purchase, which has been kept refrigerated in my...