Zeo has its uses for sure. My concern when using that or any other product that removes ammonia is that with the water changes will completely remove any ammonia from your tank. while that seems like a good idea, your starving what little bacteria you have, so as soon as you go back to weekly water changes or remove the zeo your going to have an ammonia spike on a new tank.
If the situation was an older tank that had a sudden ammonia spike and otherwise had an established system i would use zeo if water changes alone where not bringing the ammonia down or i was incapable of doing the water changes needed for whatever reason.
to use or not use zeo would depend on what your ammonia levels are at, but with such a small tank i would lean toward increasing water changes over the zeo in general.
to utilize the bio in the 60 i would directly take from the biological media to suppliment your 10s. gravel may help but you get more bang from the actual sludge in the other tanks filter. as odd as it may sound if you cant get some biomedia from the 60s setup... get some sludge from the filter. take out some media and get the solid bits that shake off. all you need is a table spoon or so. add it directly to the back of your filter. keep it in a ziplock ect so it doesn't dry out.
In a nutshell, i would get you water tested again or pick up a test and test it. exact numbers would help tell how "bad" it is. get the zeo.. you can always return it if you don't end up needing it, but you'll have it if you do. get the appropriate sized bag for your filter.. while the loose stuff is cheaper it can be annoying to try and juggle with everything else unless you don't mind. it costs abit more to buy it pre-bagged in the right size for your filter but it shouldn't be more the a few bucks either way.
If the situation was an older tank that had a sudden ammonia spike and otherwise had an established system i would use zeo if water changes alone where not bringing the ammonia down or i was incapable of doing the water changes needed for whatever reason.
to use or not use zeo would depend on what your ammonia levels are at, but with such a small tank i would lean toward increasing water changes over the zeo in general.
to utilize the bio in the 60 i would directly take from the biological media to suppliment your 10s. gravel may help but you get more bang from the actual sludge in the other tanks filter. as odd as it may sound if you cant get some biomedia from the 60s setup... get some sludge from the filter. take out some media and get the solid bits that shake off. all you need is a table spoon or so. add it directly to the back of your filter. keep it in a ziplock ect so it doesn't dry out.
In a nutshell, i would get you water tested again or pick up a test and test it. exact numbers would help tell how "bad" it is. get the zeo.. you can always return it if you don't end up needing it, but you'll have it if you do. get the appropriate sized bag for your filter.. while the loose stuff is cheaper it can be annoying to try and juggle with everything else unless you don't mind. it costs abit more to buy it pre-bagged in the right size for your filter but it shouldn't be more the a few bucks either way.
