A 10WT will be OK for smaller fish but keep in mind that last season on my few trips I was mainly casting to Tarpon between 50 and 130lbs. Those fish are more like 12WT quarry, not 10WT. The other issue is the rod. A 10WT rod will not be able to apply enough pressure to the larger fish to get them landed and released in a reasonable amount of time. If you fight the fish too long you have turned that Tarpon into shark food and that's not good.

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Jeff - AKA Dr. Fish
If it has fins and swims than I must chase it!