Fishlets: A Basic Guide to Tank Mode

I have 100+ hours in the game at the time I’m writing this. This is just information on tank mode that I think might be useful for those just starting the game.

Be aware that the game is only about a month old right now and changes may occur in the future. I may or may not update the guide as updates happen.

Fish in tanks do not require any tending. They do not need to be fed and their tanks never become dirty. You can choose to feed your fish, but it does not affect mood or $/min produced.

Fish become upset/miserable when their conditions are not met, e.g., too many/not enough of same species or incorrect water type (fresh vs. salt). Upset/miserable fish do not produce any $/min, but there are no other consequences.

Content: Fish is in correct water type and has correct number of its same species.

Happy: Content fish in a tank with a heater. Happy fish do not produce more &/min than content fish.

Upset/miserable: Fish is in incorrect water type or has too many/too few of same species in the tank. Upset/miserable fish do not produce any $/min. Putting a heater in the tank will not raise the mood.

Fish are graded from C-S. The higher the grade, the more $/min and the higher the sell price. The higher grades (A and S) are rarer than lower grades (B and C).

When breeding, the grade of the breeding fish doesn’t seem to matter and the grades of offspring are random. For example, my current breeder is a B-grade common variant and it has produced all grade types.

All fish have multiple variations, some more rare than others. With the exception of one fish species, rare variants appear randomly when purchasing or breeding fish. Common variants can produce rare variants through breeding.

Rare variants shared by all fish species:
Albino, Melanistic, Golden, Glass, and Unique

Rare variants sell for more than common variants and produce more $/min.

$/min is important at the beginning of the game, but the real money is made by breeding and selling expensive fish.

Click the pink heart in the fish’s information box to put it in the breeding box. The fish will produce an egg every 30 seconds. The maximum amount of eggs that can be produced is eggs + fish = 100. So, if the only fish in the tank is the one in the breeding box, then it can produced 99 eggs.

Eggs are only produced when the game is running and the tank with the breeding box is open. It’s a long process to produce 99 eggs and you cannot do anything else in the game, so I like to have the tank open on one monitor while I do something else on the other one.

You’ll need a breeding box ($1,000,000) and you’ll want an auto-sorter ($500,000). That’s an investment of $1,500,000 + breeder fish. To make a profit on one round of producing 99 eggs, your fish will need to sell for an average of just over $15,000 each. Therefore, I suggest waiting until you have the $20,000 fish unlocked, but the $50,000 would be better.

Breeder Box $1,000,000- Let’s you breed fish.

Auto-sorter $500,000- Sells unwanted fish automatically. You can choose which grades to sell. If you lock fish, they will not be sold by the auto-sorter. This is great for selling off bred fish and when purchasing fish just to get rare variants. Set the auto-sorter to sell all but rare variants, then just click to purchase and sell non-rare variants immediately.

Heater $25,000- Makes content fish happy. Does not affect the mood of upset or miserable fish. Happy fish do not produce more $/min than content fish, so this is pretty useless, imo.

Auto-feeder $200,000- Feeds fish every minute. Fish do not need to be fed. I strongly recommend you do not buy this. All that will happen is that an annoying noise will pop up every minute.

Filter $75,000- Cleans spoiled fish food. Only needed if you feed your fish. Tanks don’t get dirty, so this is also not needed.

Tank upgrades cannot be removed once purchased. The only way to remove them is to reset the tank and start over.

Thank you for reading. I hope you found this helpful.

If I’ve made any mistakes or there is something you think I should add, let me know in the comments.