Just checked out the Acocks Green History Society site and there were, apparently 5 moats - as listed below. The Gatteridge Road moat must be the one mentioned in post #7
Hiron Hall Moat
Moat arms to the south and east of "Iron Hall" can be seen on the 1st edition OS map
Broomhall Moat
Moat arms can be seen on two sides of the house on the 1st edition OS map
Tyseley Hall
The 1st edition OS map shows an L-shaped pond to the south-east of Tyseley Farm
Pearl Grove Moat
The 1st edition OS map shows an L-shaped pond forming the north-east corner of the moat and a change in the direction of a field boundary possibly indicating the south-west corner.
Warwick Road/Grattidge Road
The moat is indicated by an L-shaped pond, on the 1st edition OS map, forming the south-west and south-east moat arms. A desk based assessment and evaluation were conducted in 2007. Excavated trenches revealed good survival of archaeological features in the south-east part of the site, consisting of a pit-like feature and cobbled surface within the interior of the moated enclosure. Further north-west, severe truncation had removed all archaeological traces with the exception of deeper features. The truncated base of the moat was found. A possible leat ran into the moat from the south-east. One sherd of medieval pottery and two fragments of medieval roof tile were found in the moat. The archaeological report can be accessed by entering the search terms 'Warwick Road Grattidge Road moat' in a search engine and choosing the archaeology data service link.