Yeah my tank is pretty new, but I let it cycle for like a week or so before I tossed them in. Im sure when I get my parameters even better i could try experimenting with them again. Flatworms are the WORST! Yeah those guys are definitely a bad pest to have in your tank!
Are you starting the tank from dry rock or live rock from the ocean that was shipped damp or live rock from fish store?
Wait! first question how long have you you been into marine hobby?
I only ask cause you kinda sound like a noob. “A week” is never enough in this hobby. I’m not trying to be a douche but take it from me, someone that got his first saltwater tank in 1998. Be patient and take your time in this hobby. You will save money and more important lives of innocent marine life.
There’s a few pointers, first take your time and be patient, second always know what you’re buying and research it before you purchase it, and third test everything constantly water parameters our key in a requirement.
Now the reason why I asked what kind of rock you started your tank with is a big difference in how much time your tank is going to take to cycle. With ocean live rock your tank should cycle with in about two months. With already cure live rock from the fish store it should only take a month. With dry live rock starting from scratch should take up to five months if not eight months. That’s why I say a week is not enough time to think your tank is cycle.
Back in October I started a 155 gallon wreath. For the first two months the water just ran no livestock all I used to cycle the tank was bacteria and a piece of raw shrimp from the grocery store. I let the tank run for two months no lights just let it get dirty and gross. Then for another two months I added 3 fish slowly and a few test corals to see what was going on.After about four months of the tank running I’ve been added five More fish. Adding that much fish at that quick of time cost my tank to go through another little psycho that was a deadly but caused an insane algae bloom. Now my tank is about six months old and it’s starting to look pretty good with some nice green Coraline algae growth and some spots of purple Coraline algae. But I still don’t believe it’s fully stocked with the beneficial bacteria‘s that a full-blown retake means. So I’m slowly adding corals as I can build up the bacteria is required.
So again I say research what you buy first and know what it’s going to take to keep that life form happy healthy to save yourself a buck from dying