Its quite possible that they are eggs if they are transparent or cloudy in colour. If they are all together in a bunch id say its from a snail. But if they are scattered around the tank like on the glass and ornaments and plants id say that u have a laying goldfish. If this is the case and u want them to hatch try not to disturb them. Hope this helps :oD
A small pebble from inside the aquarium
a testicle
Aquarium snail eggs are usually small, clear or translucent, and can be found attached to surfaces like glass or plants in the tank. They may appear as small gelatinous blobs or clusters. If you see these characteristics, it is likely a snail egg in your aquarium.
Go on google images and type in aquarium snails.
Ball bearings
Typically, it is recommended to start with one goldfish for every 20 gallons of water in a small aquarium. So, for a small aquarium of 10 gallons, you would need one goldfish to start.
Get a small Aquarium Fish Net, get the body of the Fish, put it in the toilet.
The center of a marble typically consists of a small piece of glass, clay, or a solid core material, which is surrounded by layers of colored glass or plastic.
They are relatively small tanks.
small balls will bounce higher because they have closer particles
Typically with a glass repair, a filling epoxy is cured inside the chip using special equipment. The filling epoxy prevents a small chip from expanding, or cracking.
No.