Badman's Tropical Fish

Site Visitors => Guest Section => Topic started by: Jacob Gaskill on December 08, 2016, 08:16:27 PM



Title: Freshwater Amphipods
Post by: Jacob Gaskill on December 08, 2016, 08:16:27 PM
I have a question regarding freshwater amphipods. Specifically, how did they get in my tank?!?!

I have an established 10 gallon, moderately planted shrimp tank. I do a 40-50% water change every 7-10 days. This evening during my water change, I noticed several amphipods and a planaria while I was vacuuming. I haven't added anything to the tank in a couple of months, so how in the heck did they get in there??? And now that they are here, should I be concerned for my shrimp? Is there anyway I can do to get rid of them, short of tearing down the tank and starting over?

Any information provided would be greatly appreciated! Thanks!


Title: Re: Freshwater Amphipods
Post by: russ on December 08, 2016, 11:35:33 PM
They were there just waiting for an opportunity to procreate in sufficient numbers to start to get noticed. Only a couple out of thousands are dangerous or parasitic. I would venture that the critters you have in your tank are not parasitic because it sounds like they lack a sufficient host. Outside the planaria you noticed, can you describe what the others look like?

You may be able to cut down on their numbers by adjusting your method of vacuuming.The more excess bio waste and leftover food, the greater chance for them to multiply into just a nuisance. The nuisance part comes in when they start to compete for food with your shrimp and being just plain aesthetically displeasing to  look at.
These little critters can be excellent food for many fish species, but alas, you have a shrimp tank.


Title: Re: Freshwater Amphipods
Post by: Jacob Gaskill on December 13, 2016, 07:07:47 PM
Thanks Russ,

I appreciate your feedback! I will certainly plan to reduce feeding quantities and to vacuum more thoroughly. I probably don't spend as much time vacuuming the hard-to-get places as I should.

As to describing the amphipods, I couldn't tell you anything more than that they look small, white, and shrimp-like. They move so fast that it has been hard for me to get a useful picture. I realize this is an poor description, but they look like the amphipods (or "scud") you would find in many freshwater lakes.

Again, thanks for the help,
Jake