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Re: [GSAS-Member] Safe in Tank Acrylic Sandpaper




For those breeding fish, chemical exposures may be even more of an issue than are mechanical harm to fish. Any substance that may cause damage to RNA or DNA should be avoided in that case. I would recommend waiting much longer than the minimum curing time for silicone sealants, avoiding vinyl hoses, etc.

Avoiding vinyl hoses? Should we weave them from palm fronds? I have had numerous successful long term breeding setups using recirculating systems where vinyl hose was an integral part of the water distribution mechanism. Rubber hose was much worse to use, made the water smell bad and didn't hold up as well.

Items that may harm gills or other organs or tissue are more important to avoid for fish that live a long time.

What fish live a long time that we would breed in captivity (compared to the wild. Are there any old fish in the wild?) Fish live *way* longer in captivity than in nature. No predators. No habitat destruction (at least, no intentional habitat destruction in captivity.)

Here, long term cumulative damage will impact the longevity of the fish.

Will impact? All you have here is proof by blatant assertion
For instance, my 3 Leporinus will live well over one decade if they are not harmed while in my care.

Fish that only live a few years probably will not have time to accumulate damage, and thus something like household dust (often high in heavy metals in older homes with old paint), fiberglass
(ie. rock wool), etc., may not be of as much concern.
Umm, do they still make rock wool avaialble in the aquarium trade? Modern fiberglass isn't mineral wool anymore.
Asbestos,  fiberglass, and heavy metals can
cause harm to both cellular components and organs in humans, and probably also in fish.

Fiberglass can cause cellular harm in humans? Do you have a reference for this? I won't argue about heavy metals, Asbestos I thought was more irritant and hence led to lung cancer than mutagen

I recommend that we avoid easily-avoided exposures.
Remember first and foremost that fishkeeping is a hobby that has been around for millenia and most fish do fine in properly dechloraminated tapwater, living way longer lives than in nature and reproducing way more successfully than in nature as well
Then the less  easily avoidable exposures are
less likely to put our pets beyond their threshold of tolerable toxic exposures. The air pollutants that get into the water, the heavy metals our tap water leaches out of the pipes, the heavy metals in the
fish food and rocks and gravel - these are harder to control.

Consider avoiding buying plants rooted in rock wool, lead strips for sinking plants, soft plastics with carcinogenic plasticizers. The industry will find good substitutes if we stop buying products that harm our fish.

The pet industry is more irresponsible and greedy than most, I doubt buying plants not rooted in rock wool (didn't think they still used that, but maybe they do) or lead sinkers (have these *ever* been shown to do anything worse than oxidize when submerged?) or whatever will make any difference to them. The experienced aquarium hobbyist just plain doesn't have enough economic impact for the pet industry to notice.

Efforts would be better spent and lead to more successful fishkeeping if, for instance, we could lobby for expiration dates on food and water treatment chemicals, real lists of ingredients, real guaranteed analyses, some truth in advertising, real consumer testing of products (eliminating marine water pumps made with iron shafts that rust out, stuff like that.) The practices of the pet fish industry are borderline abhorrent, but lead sinkers and rock wool bases for plants aren't even in the top 100 of the problems that should be fixed. All this IMHO much like the original poster was, I'm sure.

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