Ings is joining Liverpool on a Bosman.
"It's a no-brainer. He looks a threat and the lad's got great potential," Aldridge told BBC Radio 5 live, before adding: "We need a really big marquee signing.
"They have been very conservative in their dealings and they still have a lot of money in the account ready to spend.
"You need a striker who guarantees 20 goals a season and they don't come cheap."
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