At this time the cichlids are 3-5 inches

I have a 550 gallon tank with large SA/CA cichlids Midas/umbie/Mayan/Red Terror/Jaguar/ Argenteus What plecos would be compatable. The bottom of the tank is covered in large pots,3" PVC and small to very lage driftwood. Ultima II bead filter pentair clean and clear cartidge filter

Wanted one Megalancistrus pleco

Megalancistrus parananus L113
OR
Megalancistrus sp. Dragon Hi Fin Pleco(L234)
OR
Megalancistrus sp. Super Dragon Hi Fin Pleco(LDA097)
Thank you for any help
please email me at billhundt@yahoo.com

I have a small 2 inch sl L31. I was wondering how long it would take to grow to 3 1/2 inches. He is in a 10 gallon tank by himself. I do a 50% water change daily.

What size tank does a megalodras uranoscopus need? Also what does he need to be a happy fish? Any and all help requested? Thank you