Blend wyeast 1728 and s04

[Andrea_88]

Hi, I made a starter (3 litres) with 1728 recovered from a scottish Ale to brew an ordinary bitter (batch size 23 litres og1039). The 1728 yeast was kept in the fridge for 50 days but the starter is fermenting. However, I fear that the amount of cells is small for my bitter and I'm thinking of using s04 (11,5 gr) yeast for a blend. Experiences?Advice? Thanks