IDC

Ecym is snail safe from what I know, its used to treat gram positive bacteria.

Scientific name:Carassius auratus
Care level:Easy.
Size: 14 inches, possibly larger.
Diet: Vegetarian. Feed spirulina flakes, and blached veggies
Lifespan: Longest recorded is 40 years, 10-20 is average.
Behavior: Very streamlined movements, peaceful with most fish. Takes up mouthfuls of substrate and sifts for food.
Breeding: Egg scatterers. Males develop breeding stars on their gill plates during spawning season.
Tank size: A tank with the dimensions 48"x18"x21" should be the smallest considered for ONE of the common goldfish (or comet goldfish). Ideally a pond is best.
Tank Mates: Hillstream loaches, dogo loaches, White cloud mountain minnows (although they may be eaten) and other goldfish.
Area of tank: All.
Price: .2 USD up to 20 USD.

Note: Contrary to common belief these fish can get quite large and thick, and are unsuitible for small aquaria or bowls.

Common Goldfish:
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(Image courtesy of http://www.seahorseaquariums.com/Common-Goldfish/3875)

[ Guests cannot view attachments ] Scientific name: Mikrogeophagus ramerizi
Care level: Moderate.
Size: At lost, 3 inches, males get larger than females.
Diet: Feed quality sinking pellet and flake, supplement with frozen Daphnia and Artemia.
Lifespan: 5 years is common but due to hormonal practices in asia and the middle east some individuals may not make it past a year.
Behavior: Can be skittish in tanks without cover, or tanks without enough of their own species. Dither fish can be used to reduce skittishness. Peaceful with most fish, males and often females may spar. Benthic by nature.
Breeding: Easy to spawn, hard to raise fry. Pit spawners. Pair will clean their desired place, on a rock or on the substrate, the female then proceeds to lay the eggs and the male fertilizes. They will guard the nest fiercly and scare away any intruders.
Tank size:For breeding purposes a tank with the base dimensions 20"x10" should suffice for a pair. For permanent residence a tank with the dimensions 24"x12"x17" should be the smallest considered.
Tank Mates: Nonboisterous fish. Corydoras spp. and pencil fish are some of the best. Best to not mix with angels. House them in a group of at least 3 for the best results. Make sure all tankmates are temperature compatible.
Area of tank: Bottom dwelling.
Price: Well bred individuals can go for 40-100 USD. Most common prices are around 15 USD.

Notes- These fish are very sensitive, so not suited for the beginner aquarist. They also require high temps of 82+, seasonal temps in the wild can often exceed 95 or more. Buy your rams from a well vetted breeder.

Photo of german blue ram, own work by aquakeeper14 on Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Blue_Ram_over_ceramic_imitation_coconut_(Male).JPG

I suggest making separate photo threads for different species.. good idea

If you are looking for places to get images with consent-
Wikimedia Commons
Unsplash

Both are great websites I have used. Give credit where applicable.

I'd like to remind people when making profiles, don't use pictures off websites if you did not get permission from the photographer/author themselves.