Hi all second post here and thanks everyone for all the help last time. Thisseems to be a great community 
We have been looking for a larger variety pleco and have i think narrowed down to either a sunshine (if we find one at a good price) a royal, a l90 paps or a 137. It will eventually live in a 180 but we want to get one really small (2-3in) and watch it grow and yes we realize it can take many years. We do have a 20l and a 55 my 20 has our new (2in) orange seam in it but I'm wondering we can start with one of the smaller tanks and move it as it starts to grow? Like start with 20 until it hits like 4in, 55 till li I'm like 7-8in. It even just start with the 55. Just expecting we would never find a 2in royal in a 180. Currently we have some various small tetras a Betta a bulldog and an orange seam plec. Some will be moving to the 180 some will stay in current homes we don't know if we will keep the 55 or just the 20 after. It will likely be quarantined in a 20 or the 55 at the very least depending on when we move what fish over.

We have been looking for a larger variety pleco and have i think narrowed down to either a sunshine (if we find one at a good price) a royal, a l90 paps or a 137. It will eventually live in a 180 but we want to get one really small (2-3in) and watch it grow and yes we realize it can take many years. We do have a 20l and a 55 my 20 has our new (2in) orange seam in it but I'm wondering we can start with one of the smaller tanks and move it as it starts to grow? Like start with 20 until it hits like 4in, 55 till li I'm like 7-8in. It even just start with the 55. Just expecting we would never find a 2in royal in a 180. Currently we have some various small tetras a Betta a bulldog and an orange seam plec. Some will be moving to the 180 some will stay in current homes we don't know if we will keep the 55 or just the 20 after. It will likely be quarantined in a 20 or the 55 at the very least depending on when we move what fish over.